I worked on a 305 in shop class 15 years ago and beleive it may have been from an '88 or '89 Firebird. we compared the manifold and heads to
the other sbc parts, they were different. There
was even a 350 of the same vintage and they were not the same. Maybe it was a running change? Of
course the engine was trash anyway, the front 4
rod throws were .140" out of round and someone stole the tpi.
