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sweetk30 · 08-01-2018, 10:08 PM

should fit just fine .

and fyi th400 eats 20-25 hp over a th350 to spin it .

and a good quality parts built th350 will hold up just fine . and i am not talking crazy money or parts in it .

th400 = vac line to mod on pass side . electric kick down switch for factory gas pedal bracket in cab . shorten drive shaft if its not a factory baloon shaft you then need new one . move crossmember back prob 1 set of holes and re drill 2 in frame .

otherwise should be basic bolt in . maybe check flex plate bolt pattern on your engine to make sure th400 lugs line up before you install and find out it wont .

08-01-2018, 10:08 PM	#3
sweetk30 Registered User Join Date: May 2012 Location: horseheads,ny rust belt Posts: 2,794	Re: Question on 350 Turbo to 400 Turbo swap should fit just fine . and fyi th400 eats 20-25 hp over a th350 to spin it . and a good quality parts built th350 will hold up just fine . and i am not talking crazy money or parts in it . th400 = vac line to mod on pass side . electric kick down switch for factory gas pedal bracket in cab . shorten drive shaft if its not a factory baloon shaft you then need new one . move crossmember back prob 1 set of holes and re drill 2 in frame . otherwise should be basic bolt in . maybe check flex plate bolt pattern on your engine to make sure th400 lugs line up before you install and find out it wont . __________________ 77-k30lb BIG truck build . 87-k30lb budget beater build . 85-k30lb the plow machine build . 85-c10sb summer fun toy . ----------------------------- HOLLEY SNIPER efi = worst case of p.i.t.a i ever had . EDELBROCK pro flo 4 = best deal going so far . love my setup works great.