JD451

Newbee here, I'm trying to settle a disagreement, I say No they didn't, he says yes they did, that they made a 400 BB & a 402 BB, i said NO, The only "true" 400 ci CHEVY was a SB, the 402 was a bore out "detuned" 396, Am i right or wrong? He is going off what chiltons said, but i think is was a bit confusing at the time of the crossover in these yrs. as to what was truely what. If they did, I would like to know the rundown on bore & stroke.

gotstylez

i dont believe chevy made a 400 big block.. but i just thought.. doesnt ponitiac have a 400 big block?? its all GM made.. i know chevy did have the 396 and the 409

JD451

I must be on the wrong forum lol, alot of veiwers & only 1 reply.

gotstylez

this forum is more slower then most others..you'll get ur answer but it might take a day or 3...

55chevyguy!

the actual displacement on the chevy trucks which had the 400 emblem on the fender that were big block was 402 cubic inches.Which were used in 1970-1972 chevy trucks