,,,,,,,,,,,,,,,,,,,,,,,,,,,400NOW.......................,,,,,,,,,,,,,,,so Back DOWN__the 400 CHEVY was the LAST ITERATION of the Small Block CHEVY introduced in 1970.
The FAMOUS Chevy SMALL BOCK started out as ONLY 265 cu inches in 1955__so Simply AMAZING that the GM engineers were able to INCREASE that 265 to 400__ALL with the EXACT SAME external engine block dimenisions eh !!!!!!!!!!!!!!!!