I'm selling a matching pair of Chevrolet casting number 3904391 RECTANGULAR port cylinder heads that were used on 1967 Corvettes equipped with the L71 427/435hp engine option. Both of these heads have the identical casting number and production date of G 9 6, July 9, 1966. They are complete with valves & valve springs. There have been no alterations, modifications, or machine work done to the ports. As seen in the pictures they are in like new condition however they should be examined prior to engine assembly and installation.

Any questions on parts & shipping please call me at 631-774-7408,
Regards, Nick