Engine swap question... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

k72516 · 05-26-2005, 07:14 PM

I'm considering buying a truck I saw. It's a 78 Chevy longbed w/ a 454 and Turbo 400 trans. I'd want to sell the motor and put a 305 or 350 in it. The bellhousing patterns are all the same right?

Oh and no flames about displacement and torque please...

GMC1tondually4dr · 05-26-2005, 08:11 PM

Yes, all Chevrolet and GMC trucks (and cars for that matter)from an inline six to a 454 have the same bell housing bolt pattern.

454's and 400 small blocks have a different flexplate. (external counter weights.)

You can (we have) switch counterweights from a 427 non counterweight to a counterweighted 454 flex plate.

Drill one out and weld the weight on in the correct place. No big deal.

If your interested-
I have a good running 350 and TH350 transmission with the flex plate and converter. It is out of a 1974 Chev. Malibu w/around 80K miles.
I pulled it out of my sons car when we got rid of the car itself.

If it doesn't rain again tomorrow I can try to put pictures up.

Where are you located?
I am in the Mpls./St. Paul, MN. area.
Have a '91 Burb to haul with.

Just looked you up on mapquest, that wouldn't be a bad trip!

arequickfab@hotmail.com

Just my .02

CCDually

k72516 · 05-26-2005, 08:31 PM

Thanks for the info there

Minnesotta??? LoL, that's one heck of a trip

05-26-2005, 07:14 PM	#1
k72516 Registered User Join Date: May 2005 Location: Easthampton, MA Posts: 74	Engine swap question... I'm considering buying a truck I saw. It's a 78 Chevy longbed w/ a 454 and Turbo 400 trans. I'd want to sell the motor and put a 305 or 350 in it. The bellhousing patterns are all the same right? Oh and no flames about displacement and torque please... __________________ Go Fast - Be Loud

05-26-2005, 08:11 PM	#2
GMC1tondually4dr Registered User Join Date: Jun 2004 Location: Rosemount, MN Posts: 341	Yes, all Chevrolet and GMC trucks (and cars for that matter)from an inline six to a 454 have the same bell housing bolt pattern. 454's and 400 small blocks have a different flexplate. (external counter weights.) You can (we have) switch counterweights from a 427 non counterweight to a counterweighted 454 flex plate. Drill one out and weld the weight on in the correct place. No big deal. If your interested- I have a good running 350 and TH350 transmission with the flex plate and converter. It is out of a 1974 Chev. Malibu w/around 80K miles. I pulled it out of my sons car when we got rid of the car itself. If it doesn't rain again tomorrow I can try to put pictures up. Where are you located? I am in the Mpls./St. Paul, MN. area. Have a '91 Burb to haul with. Just looked you up on mapquest, that wouldn't be a bad trip! arequickfab@hotmail.com Just my .02 CCDually Last edited by GMC1tondually4dr; 05-26-2005 at 08:20 PM.

05-26-2005, 08:31 PM	#3
k72516 Registered User Join Date: May 2005 Location: Easthampton, MA Posts: 74	Thanks for the info there Minnesotta??? LoL, that's one heck of a trip __________________ Go Fast - Be Loud



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