Cleaveland in a '66

MUSTANGROB · 04-01-1999, 01:08 PM

I left this message before, but I didn't get a clear answer. Can someone tell me if a complete 351C engine will fit between the shock towers of a '66 'Stang? If I machine my 289W block to accept Cleaveland heads, will it be the same width assembled as a 351C? Will it bolt up to my C4 tranny? Great April Fools Joke!

mslcr · 04-01-1999, 10:55 PM

This modified setup cannot be as wide as the Cleveland because the V is narrower on the Windsor motors.

Kcode351 · 04-02-1999, 12:16 AM

Cleaveland heads on a 289 are a big pain in the "third member". Once you get the heads figured out you need to figure out the manifold. A machine shop will do anything you want to pay them to. I think it would be a better investment to buy some aftermarket heads or have your 289, 302, or 351w heads reworked. A good machine shop can put 1.96/1.60 or 2.02/1.60 valves, hard valve seats, guide plates, screw in studs, and a nice port and polish job. The tight chambers on early 289 heads offer some nice compression numbers for cheap. As far as the complete 351c fitting between the towers. Headman makes a conversion header but it may take other mods to get it to fit. The 351w is a much more comon swap. In Mustang Monthly there is a engine company advertised called "Clevor" that sells a engine that is a 351 cleveland and 351 windsor mix. Im sure they can answer all your questions.

travs69 · 04-07-1999, 07:52 PM

try www.wabba.net.. then go to how to's.. there's a page full of pics for putting 351c heads on a 351W...

jrdalles · 07-10-2005, 08:04 AM

yes, c4 tranny will bolt up to a cleveland. plus it is lighter. have the same set-up in my 68

rbohm · 07-11-2005, 03:05 AM

yes the 351c fits in the 65-66 mustangs, but it is tight, and you do need swap headers as the stock exhaust manifolds will be up against the shock towers. the 351c bolts up to the stock 289 engine mounts, and to any 6 bolt bellhousing the 289 bolts to. you will need more radiator though, and if you use an intake other than the performer or the stock 351c intake, you likely will need a hood scoop for clearance.

as for putting 351c heads on a 289, it can be done, but for the money you will spend getting an intake, and having the machine work done, you would be well on your way to buying a set of aftermarket heads for the 289 that will come close to the 351c 2v heads airflow.

04-01-1999, 01:08 PM	#1
MUSTANGROB Registered Member Join Date: Jan 1999 Location: CHARLOTTE, NC, USA Posts: 25	Cleaveland in a '66 I left this message before, but I didn't get a clear answer. Can someone tell me if a complete 351C engine will fit between the shock towers of a '66 'Stang? If I machine my 289W block to accept Cleaveland heads, will it be the same width assembled as a 351C? Will it bolt up to my C4 tranny? Great April Fools Joke!

07-10-2005, 08:04 AM	#5
jrdalles Registered Member Join Date: Jul 2005 Posts: 2	Re: Cleaveland in a '66 yes, c4 tranny will bolt up to a cleveland. plus it is lighter. have the same set-up in my 68

07-11-2005, 03:05 AM	#6
rbohm Registered Member Join Date: Jul 2002 Location: tucson,az/luray,va Posts: 243	Re: Cleaveland in a '66 yes the 351c fits in the 65-66 mustangs, but it is tight, and you do need swap headers as the stock exhaust manifolds will be up against the shock towers. the 351c bolts up to the stock 289 engine mounts, and to any 6 bolt bellhousing the 289 bolts to. you will need more radiator though, and if you use an intake other than the performer or the stock 351c intake, you likely will need a hood scoop for clearance. as for putting 351c heads on a 289, it can be done, but for the money you will spend getting an intake, and having the machine work done, you would be well on your way to buying a set of aftermarket heads for the 289 that will come close to the 351c 2v heads airflow. __________________ define irony: a bunch of idiots on a plane, dancing to a song made famous, by a band who died in a plane crash. fordsix.com admin

04-01-1999, 10:55 PM	#2
mslcr Registered Member Join Date: Mar 1999 Location: WY Posts: 41	This modified setup cannot be as wide as the Cleveland because the V is narrower on the Windsor motors.

04-02-1999, 12:16 AM	#3
Kcode351 Registered Member Join Date: Feb 1999 Location: Austin, TX, USA Posts: 41	Cleaveland heads on a 289 are a big pain in the "third member". Once you get the heads figured out you need to figure out the manifold. A machine shop will do anything you want to pay them to. I think it would be a better investment to buy some aftermarket heads or have your 289, 302, or 351w heads reworked. A good machine shop can put 1.96/1.60 or 2.02/1.60 valves, hard valve seats, guide plates, screw in studs, and a nice port and polish job. The tight chambers on early 289 heads offer some nice compression numbers for cheap. As far as the complete 351c fitting between the towers. Headman makes a conversion header but it may take other mods to get it to fit. The 351w is a much more comon swap. In Mustang Monthly there is a engine company advertised called "Clevor" that sells a engine that is a 351 cleveland and 351 windsor mix. Im sure they can answer all your questions.

04-07-1999, 07:52 PM	#4
travs69 Registered Member Join Date: Sep 1998 Location: East Alton, IL, USA Posts: 51	try www.wabba.net.. then go to how to's.. there's a page full of pics for putting 351c heads on a 351W...