New Ceramic Coated Big Block Cast Iron Manifolds! I could not find anyone that makes shorty headers for a big block, for any year Corvette, so I am in the process of designing a system that will be Big tubed, headers. A direct replacement for the original Cast Iron type. Until then these are still the best! NO SMOG HOLES! This header system works great for all year Corvette from 65 - 74 with big block motors, but will fit 63 and 64 Corvettes with big block motors. These headers fit nicely around your factory steering box, Corvettes with Air Conditioning, and easily misses the frame. Perfect for Corvettes with Sidepipes.