60759 Performer Cylinder Head - Assembled for Small Block Chevy

These Performer cylinder heads are designed for 302 327 350 and 400 cid small-block Chevy engines up to 1986. These cylinder heads include your choice of 64cc In order to retain stock compression ratio on 1970 and earlier small-blocks or 70cc combustion chambers and high flow intake and exhaust ports. Complete heads include larger-than-stock 1.46in valve springs to handle most high-lift cams. These heads retain the stock intake port location for compatibility with standard manifolds and headers. Heat crossover is machined for 50-state emissions legal performance. Features -Performer Cylinder Head - Assembled for Small Block Chevy -50-State Street Legal Aluminum Cylinder Head -Out-of-the-Box Bolt-On Performance -70cc Combustion Chambers Improve Performance -Retain Stock Compression Ratio Compatibility -Fits Small Block Chevy