big block to saginaw 3 speed - The 1947 - Present Chevrolet & GMC Truck Message Board Network

chevroletman19712001 · 07-08-2006, 12:53 PM

how much needs to be done to bolt up a big block to a factory straight 6 3 speed tranny. can the smaller clutch handle a mild 454, if it will bolt up? I kinda doubt ill ever get around to doing this, with todays current gas prices, but i just want to know if i could if i had the chance.

magnethead · 07-08-2006, 04:33 PM

bellhousing is probably different, along with the clutch you mentioned. Not sure if a big block clutch could be put on.

chevroletman19712001 · 07-08-2006, 06:38 PM

oh well guess if i ever did do the swap id just use the turbo 400. thanks for the advice i didnt even think about the bellhousing being different i figured they were all the same. i just knew the v8s had larger clutches.

Kurt L · 07-08-2006, 06:52 PM

i think that all you have to do is have an 11'' clutch,flywheel and it'll all bolt up.bell housings are the same.unless you go from full bell to half a bell housing.thats the only diff i can think of.oh yeah make sure your clutch is course splined.

**Captkaos** · 07-10-2006, 06:29 PM

There is nothing different from the 3 speed bell to a 4 speed bell for a truck. I did this swap years ago, but I used a muncie M22 (passenger car trans.) and the 6 cyl bellhousing. I wouldn't recommend putting the 3 speed behind it though. If you do, I wouldn't abuse it much.

07-08-2006, 12:53 PM	#1
chevroletman19712001 Registered User Join Date: Jun 2006 Location: SC Posts: 47	big block to saginaw 3 speed how much needs to be done to bolt up a big block to a factory straight 6 3 speed tranny. can the smaller clutch handle a mild 454, if it will bolt up? I kinda doubt ill ever get around to doing this, with todays current gas prices, but i just want to know if i could if i had the chance. __________________ 71 chevy longhorn 1 ton 79 chevy straight 6 79 burb 454 91 silverado 350 TBI and a few others that my brand loyalty wont permit me to post. Eureka Boys!!!!

07-08-2006, 04:33 PM	#2
magnethead 7000 #'s of american IRON Join Date: Dec 2004 Location: north tx Posts: 883	Re: big block to saginaw 3 speed bellhousing is probably different, along with the clutch you mentioned. Not sure if a big block clutch could be put on.

07-08-2006, 06:38 PM	#3
chevroletman19712001 Registered User Join Date: Jun 2006 Location: SC Posts: 47	Re: big block to saginaw 3 speed oh well guess if i ever did do the swap id just use the turbo 400. thanks for the advice i didnt even think about the bellhousing being different i figured they were all the same. i just knew the v8s had larger clutches. __________________ 71 chevy longhorn 1 ton 79 chevy straight 6 79 burb 454 91 silverado 350 TBI and a few others that my brand loyalty wont permit me to post. Eureka Boys!!!!

07-08-2006, 06:52 PM	#4
Kurt L Senior Member Join Date: May 2003 Location: ne florida Posts: 2,665	Re: big block to saginaw 3 speed i think that all you have to do is have an 11'' clutch,flywheel and it'll all bolt up.bell housings are the same.unless you go from full bell to half a bell housing.thats the only diff i can think of.oh yeah make sure your clutch is course splined.

07-10-2006, 06:29 PM	#5
Captkaos www.73-87chevytrucks.com Join Date: Dec 1999 Location: Birmingham, AL Posts: 6,935	Re: big block to saginaw 3 speed There is nothing different from the 3 speed bell to a 4 speed bell for a truck. I did this swap years ago, but I used a muncie M22 (passenger car trans.) and the 6 cyl bellhousing. I wouldn't recommend putting the 3 speed behind it though. If you do, I wouldn't abuse it much. __________________ Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com



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