Pair of matching dates (E-1-70) # 4290 1970 Chevy Big Block Oval Port Cylinder Heads used on 396-350HP L34 & 454-390HP LS5 engines in Chevelle Camaro Nova Corvette Monte-Carlo and Elcamino. These are Closed Chamber design. The elderly man who owned them use to be on a professional drag race team and built many motors, he had been working on these lightly porting/polishing them. They are bare as he was planning on installing new valves and springs. Great set of good cores to build.

J20484