Headers on bbc
cheyboy97, I think that the light trucks had the 402 in them until 1972. In 1973 the light trucks were offered with 454 ci engines. These gen IV 454 engines have been in trucks until 1990. In 1991-1995 the Gen V 454 was used and in 1996 the Gen VI came out. Doesn't matter whether it was a Chevy or GMC.