C6 In 65 Mustang

C898 · 04-02-2002, 12:34 AM

Planning on putting a C6 in a 65 mustang with a 289 and headman headers, reason being it was practically given to me and in good shape, Question: will it fit, and if not what changes will need to be made, is there any info on this swap, cant seem to find any at all.....thanks in advance

zach0 · 04-02-2002, 03:21 PM

From what I understand if it is correct. The C-6 will fit without any changes except for the spacing plate and maybe the starter. Correct me if I'm wrong.

69fastback · 04-02-2002, 11:52 PM

I have never heard of a c-6 with a small block motor. Have they ever came w/ a SB?

Ron1 · 04-03-2002, 12:38 AM

Here is a breakdown of the Ford Transmissions...I would probably see if I could trade someone for a C4. The C6 was really designed for the big torque big blocks, and outweighs the C4 by about 25-30 pounds.
http://www.baumannengineering.com/alphabet.htm

Ron

mustangman65_79 · 04-03-2002, 10:14 AM

There was a few '66 with a c6. I think the bell housing is diff. Have fun trying to find one.

MrWesson22 · 04-03-2002, 10:17 AM

Sell it if you can and find a c4. That c6 will eat up so much power, it'll make your 289 feel like a 6 banger.

mustangman65_79 · 04-03-2002, 10:24 AM

eat up more power, how? Never heard of that.

mean81GT · 04-03-2002, 01:20 PM

you have to find a c-6 for a 351, same bell husing as the 289

281yellowGT · 04-03-2002, 02:07 PM

He has a C6, what he wants to know is " Will it fit under the car without sheetmetal work?
Oh by the way he has enough power to turn that tranny

mustangman65_79 · 04-04-2002, 10:27 AM

Hey, 281yellowGT, your new hu, u should go and introduce yourself in the oval room

gtrolly · 04-04-2002, 06:50 PM

i am in the final stages of restoring a 1965 gt and have been told by very knowledgable restorer that a c6 does not fit inside the tunnel or line up with existing crossmembers also the physical size of the c6 requires modification of length of driveshaft. so i dont care how cheap the c6 is find a c4 to save money and frustration it is not an easy swap. although contrary to what some said the transmission will bolt up to a small block

MrWesson22 · 04-04-2002, 09:51 PM

Due to larger and heavier internal components, the rule of thumb I've heard is that a similarly built C6 requires an additional 20-25% horsepower to spin over a C4, which equates to around a 10-15% hp difference at the rear wheels. I haven't done any testing personally, but if you go to mustangsandmore.com and ask Alex (aka Moneymaker -- SS NHRA nat'l record holder), he says a C4 is generally worth around .3 in the 1/4 over a C6. I'm a 4 speed guy myself, but everyone I've talked to says a C6 is only beneficial if a C4 will not handle the power produced, which will not be the case on a 289.

04-02-2002, 12:34 AM	#1
C898 Registered Member Join Date: Apr 2002 Location: oklahoma Posts: 3	C6 In 65 Mustang Planning on putting a C6 in a 65 mustang with a 289 and headman headers, reason being it was practically given to me and in good shape, Question: will it fit, and if not what changes will need to be made, is there any info on this swap, cant seem to find any at all.....thanks in advance

04-02-2002, 03:21 PM	#2
zach0 Registered Member Join Date: Apr 2001 Location: Hampton, Virginia Posts: 227	From what I understand if it is correct. The C-6 will fit without any changes except for the spacing plate and maybe the starter. Correct me if I'm wrong. __________________ 1980 RX7 with 289 Ford V-8 bored .030 over, Very radical cam, Torker 2 high rise intake, Holley 650 Carb, MSD Nascar 6ALN ignition, MSD coil and distributor, Headers with dual open side exhaust. Over 300 horse. 1966 Mustang still in progress

04-02-2002, 11:52 PM	#3
69fastback IRAQ VET Join Date: Feb 2000 Location: high desert California Posts: 1,480	I have never heard of a c-6 with a small block motor. Have they ever came w/ a SB? __________________ 428 Cobra Jet SOHC 5.4 3V F-150 96 mystic cobra 91 GT

04-03-2002, 10:14 AM	#5
mustangman65_79 My poor 79 RIP Join Date: Oct 2001 Location: Suisun City, Posts: 2,320	There was a few '66 with a c6. I think the bell housing is diff. Have fun trying to find one. __________________ '84 mustang GT turbo '85 LTD '89 Camaro Irocz z28 '94 Lightning '96 Trans am

04-03-2002, 10:17 AM	#6
MrWesson22 Registered Member Join Date: Sep 2000 Location: Dacula, GA Posts: 73	Sell it if you can and find a c4. That c6 will eat up so much power, it'll make your 289 feel like a 6 banger. __________________ Neal 69 stang 351C/4sp

04-03-2002, 12:38 AM	#4
Ron1 Registered Member Join Date: Sep 1999 Location: Vancouver, WA USA Posts: 439	Here is a breakdown of the Ford Transmissions...I would probably see if I could trade someone for a C4. The C6 was really designed for the big torque big blocks, and outweighs the C4 by about 25-30 pounds. http://www.baumannengineering.com/alphabet.htm Ron

04-03-2002, 10:24 AM	#7
mustangman65_79 My poor 79 RIP Join Date: Oct 2001 Location: Suisun City, Posts: 2,320	eat up more power, how? Never heard of that. __________________ '84 mustang GT turbo '85 LTD '89 Camaro Irocz z28 '94 Lightning '96 Trans am

04-03-2002, 01:20 PM	#8
mean81GT Registered Member Join Date: Nov 2001 Location: NY Posts: 299	you have to find a c-6 for a 351, same bell husing as the 289 __________________ I'm a glutton for punishment.

04-03-2002, 02:07 PM	#9
281yellowGT Registered Member Join Date: Apr 2002 Location: Mustang,Oklahoma Posts: 8	He has a C6, what he wants to know is " Will it fit under the car without sheetmetal work? Oh by the way he has enough power to turn that tranny __________________ 1998 Chrome Yellow Mustang GT Build Date 10/12/98 1 of only 375 Last edited by 281yellowGT; 04-03-2002 at 11:41 PM..

04-04-2002, 10:27 AM	#10
mustangman65_79 My poor 79 RIP Join Date: Oct 2001 Location: Suisun City, Posts: 2,320	Hey, 281yellowGT, your new hu, u should go and introduce yourself in the oval room __________________ '84 mustang GT turbo '85 LTD '89 Camaro Irocz z28 '94 Lightning '96 Trans am

04-04-2002, 06:50 PM	#11
gtrolly Registered Member Join Date: Apr 2002 Location: new hampshire Posts: 1	i am in the final stages of restoring a 1965 gt and have been told by very knowledgable restorer that a c6 does not fit inside the tunnel or line up with existing crossmembers also the physical size of the c6 requires modification of length of driveshaft. so i dont care how cheap the c6 is find a c4 to save money and frustration it is not an easy swap. although contrary to what some said the transmission will bolt up to a small block

04-04-2002, 09:51 PM	#12
MrWesson22 Registered Member Join Date: Sep 2000 Location: Dacula, GA Posts: 73	Due to larger and heavier internal components, the rule of thumb I've heard is that a similarly built C6 requires an additional 20-25% horsepower to spin over a C4, which equates to around a 10-15% hp difference at the rear wheels. I haven't done any testing personally, but if you go to mustangsandmore.com and ask Alex (aka Moneymaker -- SS NHRA nat'l record holder), he says a C4 is generally worth around .3 in the 1/4 over a C6. I'm a 4 speed guy myself, but everyone I've talked to says a C6 is only beneficial if a C4 will not handle the power produced, which will not be the case on a 289. __________________ Neal 69 stang 351C/4sp

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