installing th400 into 72 swb with th350? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

matt_field · 08-13-2005, 06:45 PM

well since the search button is no longer there, i have to ask this question. i just bought a 72 swb 2wd truck that has a th350 in it now.... i want to put a 396 in it and put in a th400 that i have. will that bolt in? is the driveshaft gonna need to be cut or anything? mount in the same spot? the truck already has a high center hump because i think it was a 4 speed truck when new... anyone that can help that would be great thanks!!

Matt

Longhorn Man · 08-13-2005, 07:22 PM

Your best bet will be to mount it all up, stock set up or otherwise, and then call your local drive line place, and ask them how they want you to measure it. There is a standard for this, but as soon as you assume they go by that standard, they won't, and your shaft will be cut too much.
It will need to be shortened, and you'l need a new yoke too.

08-13-2005, 06:45 PM	#1
matt_field Registered User Join Date: Apr 2001 Location: Detroit Lakes, Minnesota Posts: 885	installing th400 into 72 swb with th350? well since the search button is no longer there, i have to ask this question. i just bought a 72 swb 2wd truck that has a th350 in it now.... i want to put a 396 in it and put in a th400 that i have. will that bolt in? is the driveshaft gonna need to be cut or anything? mount in the same spot? the truck already has a high center hump because i think it was a 4 speed truck when new... anyone that can help that would be great thanks!! Matt __________________ 1971 k5 blazer 80k mike survivor 1972 3/4 ton 4wd Cummins 12v 1967 swb 2wd 427bbc 1968 4wd shortbox 1971 Cheyenne swb k10 unrestored 1971 Cheyenne super 40k 402bb survivor 1967 Chevy k10 (first truck) 1968 L78 camaro survivor 18k miles 1969 z28 survivor 60k miles 1969 z28 survivor 39k miles 1969 z28 rs survivor 80k miles

08-13-2005, 07:22 PM	#2
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Your best bet will be to mount it all up, stock set up or otherwise, and then call your local drive line place, and ask them how they want you to measure it. There is a standard for this, but as soon as you assume they go by that standard, they won't, and your shaft will be cut too much. It will need to be shortened, and you'l need a new yoke too.



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