Questions about a 64.5-66 Mods

Dster20 · 10-01-2001, 05:07 PM

Okay, I'm a little new to this website. I've spent the last hour surfing it, and am very impressed!! I am wanting to get ideas on something.

I am planning to build a 1966 Coupe or Fastback in memory of my father who recently passed. I don't have the car, or anything just yet. I prefer to plan things out before I get in to something that's over my head.

1) How large of a motor can you cram into a '66? (I'm thinking 351W-w/o any major changes, I do have a 460, but am sure I allready know the answer to fitting that in there.)

2) What is the highest output of horsepower/torque you can pull from a 351W and still keep it fairly stable? I know it can be bored and stroked a bit... how much?

3) How hard would it be to slap a 5 speed behind it, (I'm thinking a Tremec would handle the load??)

I have no set plans as of yet. Like I said I prefer to map things out before I jump in and do something. Any information, links, etc. is greatly appreciated. The more specific the better on any information you feel like giving. Thanks for all the help!!!!

Gearhead999 · 10-01-2001, 08:12 PM

1. You can fit any engine into any car. Just how much trouble to you wnat to go through. A 351W will fit without alot of modifications. You can stroke a 351W to around 426 easily.

2. A 426 should put out 450-500 HP easily. Depends on how much money you want to spend.

3. 5 speed isn't that hard. You see them all the time on the board.

6T9PONY · 10-01-2001, 09:14 PM

Indy Mustang Performance builds a crate engine 351 Windsor bored and stroked to 408 cubes. Puts out 575 horsepower. IMP also has a few other racing/street engines they build.
http://www.indymustang.stangnet.com

------------------
Previously "BennyBoy"
'69 Coupe with 351W-I rolled it 8/8
Edelbrock RPM intake, Edelbrock RPM cam, Edelbrock 750 cfm carb, Hedman headers, 2 1/2" pipe, glasspacks, C4: shift kit, 9" Currie: Trac-Lok 3.70s, 290hp-stock heads

[This message has been edited by 6T9PONY (edited 10-01-2001).]

jwboner · 10-02-2001, 01:23 AM

I like the looks of the fastbacks but they are expensive, if you want to really modify the car I would get a coupe. There are more of them out there and they cost less, and actually weigh a little less. A 351 is the biggest engine you can fit without removing the shock towers. You can get very good power from a 351 race-stroker, coasthigh.com has many kits to choose from.

------------------
65 fastback
347 DFI injected, TFS heads, T5, 4.11 9", tc subframe conns, torq thrust D's
A little history lesson using today's tech.

Mercury · 10-02-2001, 01:37 AM

Not to be annouying, but 351 isnt the biggest stock displament motor that can be put in a First Gen Mustang without hacking the shock towers up. Maybe for the world of Windsors.

I helped put a 351 cleveland in a 65 coupe, and the 400 is the same thing externally.

It actually wasnt all that hard to mount the engine, now the C-6 that was behind it, thats another story.

------------------
64 1/2 "D" code Red Mustang Coupe. 289, C4, Mallory duel point. Ported & Polished 65 heads shaved .01 with 351 valves, 11:1 comp, 1.7:1 rockers, blue wolverine lumpy cam, modified 4100 Hipo 4 barrel. GT Apperance pkg. And to many others to list

2000 Perf Red Mustang GT. 5spd. BBK Underdrive pulleys, Flotech off-road H pipe. Hurst T-Handle, 40 series Flowmasters, Steeda Tri-Ax
64 1/2 red 6cyl coupe. Future resto.

73 Mustang Boy · 10-02-2001, 09:23 AM

I have heard that the 351-400M motors were alot wider and taller than the 351C. When I was dooing research before putting my 351W in my 73 I was told the 400M would not even fit in my engine compartment without major modifications. The 351-400M motors also use the same bell housing as the 429-460 big blocks.

Mercury · 10-02-2001, 01:31 PM

No modifications to the shock towers was required to fit the Cleveland in the 65 coupe, but Exhaust choice is limited.

The guy had 180 Headers that just fit between the shock towers and the heads. Each tube was individualally connected to the heads, it wasnt your usual set of headers. They were a pain, but with some work and scraped knuckles we got them on.

Oh, and the drive shaft also had to be cut, Now to think of it.The car was The Mustangs version of Frankenstien. It had a 390 Truck Radiator in it, a Ford 9 in out of a truck that was a little wider than the Mustangs rear end, and a Jerry rigged threaded rod Kick down, and a Custom made Shift detent, and parking paw. God, Building that C-6 was something else.

We shaved down the pressure plates to make room for an extra set of clutches. All kinds of "Custom" work done to that car.

Havent talked to that guy in a while, eversince he the DWI. Hmmmmmm WOnder if he wants to sell the coupe.

Man that thing would haul like there was no tommorrow, even with 2.73's in the rear. Which is not exactly the best rear ratio if you have 4 Barrel heads, a Single Plane manifold, and a hellacious cam. It would still scoot when the gas was punched.

One of the few cars I've riden in that will spin the back tires in 3rd gear (Auto C-6) at 70 MPH when the throttle is nailed.

Dster20 · 10-02-2001, 05:10 PM

Thanks guys!! I really appreciate all of the info and sources to checkout. I'm still more than happy to hear more! I figure the more ideas I can get now will help me out down the road.

thunderbolt · 10-04-2001, 05:47 PM

merc and others:
Like someone said earlier, the 351C and 351M/400 are not the same block. They are based on the same design, but the 351M/400 is taller and consequently wider, I think it is 1 inch taller and 1.5 wider but that is memeory not fact. And of course the 351M/400 takes the big block bell housing where the 351C uses the small block bell housing.
I am not sure what can be wedged into an early mustang with out mods. I think the general consensus is a 351W block based motor. But I have seen such mustangs equipped with FE 427's and even one with a Chev 454 which is really big.

10-01-2001, 05:07 PM	#1
Dster20 Registered Member Join Date: Sep 2001 Location: Mendon, IL, USA Posts: 10	Questions about a 64.5-66 Mods Okay, I'm a little new to this website. I've spent the last hour surfing it, and am very impressed!! I am wanting to get ideas on something. I am planning to build a 1966 Coupe or Fastback in memory of my father who recently passed. I don't have the car, or anything just yet. I prefer to plan things out before I get in to something that's over my head. 1) How large of a motor can you cram into a '66? (I'm thinking 351W-w/o any major changes, I do have a 460, but am sure I allready know the answer to fitting that in there.) 2) What is the highest output of horsepower/torque you can pull from a 351W and still keep it fairly stable? I know it can be bored and stroked a bit... how much? 3) How hard would it be to slap a 5 speed behind it, (I'm thinking a Tremec would handle the load??) I have no set plans as of yet. Like I said I prefer to map things out before I jump in and do something. Any information, links, etc. is greatly appreciated. The more specific the better on any information you feel like giving. Thanks for all the help!!!!

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10-01-2001, 08:12 PM	#2
Gearhead999 Registered Member Join Date: Sep 1998 Location: Oviedo, FL Posts: 992	1. You can fit any engine into any car. Just how much trouble to you wnat to go through. A 351W will fit without alot of modifications. You can stroke a 351W to around 426 easily. 2. A 426 should put out 450-500 HP easily. Depends on how much money you want to spend. 3. 5 speed isn't that hard. You see them all the time on the board.

10-01-2001, 09:14 PM	#3
6T9PONY All about the Windsor. Join Date: Feb 2000 Posts: 2,052	Indy Mustang Performance builds a crate engine 351 Windsor bored and stroked to 408 cubes. Puts out 575 horsepower. IMP also has a few other racing/street engines they build. http://www.indymustang.stangnet.com ------------------ Previously "BennyBoy" '69 Coupe with 351W-I rolled it 8/8 Edelbrock RPM intake, Edelbrock RPM cam, Edelbrock 750 cfm carb, Hedman headers, 2 1/2" pipe, glasspacks, C4: shift kit, 9" Currie: Trac-Lok 3.70s, 290hp-stock heads [This message has been edited by 6T9PONY (edited 10-01-2001).]

10-02-2001, 01:23 AM	#4
jwboner Registered Member Join Date: Jun 2001 Location: Under the hood Posts: 164	I like the looks of the fastbacks but they are expensive, if you want to really modify the car I would get a coupe. There are more of them out there and they cost less, and actually weigh a little less. A 351 is the biggest engine you can fit without removing the shock towers. You can get very good power from a 351 race-stroker, coasthigh.com has many kits to choose from. ------------------ 65 fastback 347 DFI injected, TFS heads, T5, 4.11 9", tc subframe conns, torq thrust D's A little history lesson using today's tech.

10-02-2001, 01:37 AM	#5
Mercury The Redneck James Bond Join Date: Sep 2000 Location: Fayetteville NC Posts: 1,707	Not to be annouying, but 351 isnt the biggest stock displament motor that can be put in a First Gen Mustang without hacking the shock towers up. Maybe for the world of Windsors. I helped put a 351 cleveland in a 65 coupe, and the 400 is the same thing externally. It actually wasnt all that hard to mount the engine, now the C-6 that was behind it, thats another story. ------------------ 64 1/2 "D" code Red Mustang Coupe. 289, C4, Mallory duel point. Ported & Polished 65 heads shaved .01 with 351 valves, 11:1 comp, 1.7:1 rockers, blue wolverine lumpy cam, modified 4100 Hipo 4 barrel. GT Apperance pkg. And to many others to list 2000 Perf Red Mustang GT. 5spd. BBK Underdrive pulleys, Flotech off-road H pipe. Hurst T-Handle, 40 series Flowmasters, Steeda Tri-Ax 64 1/2 red 6cyl coupe. Future resto.

10-02-2001, 09:23 AM	#6
73 Mustang Boy Registered Member Join Date: Aug 2001 Location: Georgia Posts: 84	I have heard that the 351-400M motors were alot wider and taller than the 351C. When I was dooing research before putting my 351W in my 73 I was told the 400M would not even fit in my engine compartment without major modifications. The 351-400M motors also use the same bell housing as the 429-460 big blocks.

10-02-2001, 01:31 PM	#7
Mercury The Redneck James Bond Join Date: Sep 2000 Location: Fayetteville NC Posts: 1,707	No modifications to the shock towers was required to fit the Cleveland in the 65 coupe, but Exhaust choice is limited. The guy had 180 Headers that just fit between the shock towers and the heads. Each tube was individualally connected to the heads, it wasnt your usual set of headers. They were a pain, but with some work and scraped knuckles we got them on. Oh, and the drive shaft also had to be cut, Now to think of it.The car was The Mustangs version of Frankenstien. It had a 390 Truck Radiator in it, a Ford 9 in out of a truck that was a little wider than the Mustangs rear end, and a Jerry rigged threaded rod Kick down, and a Custom made Shift detent, and parking paw. God, Building that C-6 was something else. We shaved down the pressure plates to make room for an extra set of clutches. All kinds of "Custom" work done to that car. Havent talked to that guy in a while, eversince he the DWI. Hmmmmmm WOnder if he wants to sell the coupe. Man that thing would haul like there was no tommorrow, even with 2.73's in the rear. Which is not exactly the best rear ratio if you have 4 Barrel heads, a Single Plane manifold, and a hellacious cam. It would still scoot when the gas was punched. One of the few cars I've riden in that will spin the back tires in 3rd gear (Auto C-6) at 70 MPH when the throttle is nailed.

10-02-2001, 05:10 PM	#8
Dster20 Registered Member Join Date: Sep 2001 Location: Mendon, IL, USA Posts: 10	Thanks guys!! I really appreciate all of the info and sources to checkout. I'm still more than happy to hear more! I figure the more ideas I can get now will help me out down the road.

10-04-2001, 05:47 PM	#9
thunderbolt Registered Member Join Date: Oct 1998 Location: Houston, TX, USA Posts: 380	merc and others: Like someone said earlier, the 351C and 351M/400 are not the same block. They are based on the same design, but the 351M/400 is taller and consequently wider, I think it is 1 inch taller and 1.5 wider but that is memeory not fact. And of course the 351M/400 takes the big block bell housing where the 351C uses the small block bell housing. I am not sure what can be wedged into an early mustang with out mods. I think the general consensus is a 351W block based motor. But I have seen such mustangs equipped with FE 427's and even one with a Chev 454 which is really big.