Is A 400 A Small Or Big-Block? [Solved]
Hi, iam Ernestine Barrett, I hope all goes well today. Is A 400 A Small Or Big-Block? [Solved] small block GM had its own version of the 400 motor but ot is considered a small block, and not a big block. Just by . 1 Liters actually, if you want to be technical. The 400 What is the largest version of the generation one small block measuring in at 6.6 L it made it Steve you in 1970 and was produced for a decade....