Cool vintage hot rod piece. Big block Chevy FOR RECTANGLE PORT HEADS. It’s been ported. Good condition. Powder coated silver at some point. Some of it is flaking. The plenum has been drilled, tapped and plugged (I assume for nitrous). All bolt holes/threads good. One hole above and between two ports is cracked outward towards the edge of the casting as seen in the pictures. but it is not a hole that accepts a bolt on modern heads so it’s moot. But wanted to make sure it’s pointed out. This is an old piece. Don’t expect a new manifold! Please ask any and all questions before bidding.