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Post Info TOPIC: 350 0r 400 trans


A Poncho Legend!

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350 0r 400 trans


Just to confirm, a 350 turbo in a Nova/Acadian has a straight, cross member, and a 400 turbo, has a cross memeber, with a curve in it? Carl

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A Poncho Legend!

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Here are pictures off e-bay     straight is 3-4 speed powerglide/350 turbo   non-straight is 400 turbo  confused



-- Edited by 427carl at 12:50, 2008-09-09

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Poncho Master!

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A 400 Crossmember was made for a BB Chevy so the holes for the tranny mount are offset to match where BB motor mounts sit them closer to the pass. side..

If you measure the one you have, if the trans mount holes are in the center it's a SB one and if they're closer to the pass. side it's a BB/400 one..

I don't know for sure but expect BOP X-Body cars used a SB style center mounted trans mount?.

I believe either style crossmembers will work w/ all trans applications as long as you elongate the holes to the side or center for whichever engine mounting position you have?.

smile



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A Poncho Legend!

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Pontiac, I bought was supposed to have 350 turbo, but has offset cross memeber  Shifts like 400 turbo    good for me!

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Poncho Master!

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427carl wrote:

Just to confirm, a 350 turbo in a Nova/Acadian has a straight, cross member, and a 400 turbo, has a cross memeber, with a curve in it? Carl



Both my turbo 400's have the straight crossmember. The first picture.



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A Poncho Legend!

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yes, but you have a big boy car   !!!

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Uber Guru

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here, look at these....
#3 is a turbo 350
#4 is the 400


-- Edited by 69 belair at 18:39, 2008-09-09

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Canadian Poncho Superstar!

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All my big 67 Chevys with 400 have the extra cross member mounts on the frame. They most have built one frame with the closer to the engine mounts and then added the extra set if a 400 was being put in

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