Cometic Chevy Mark-IV Big Block V8 Top End Gasket Kit-4.375in Bore-.051in MLS Cylinder Head GasketCOMETIC StreetPro Kits cater to the budget minded street rodder who is looking to purchase a kit with all necessary gaskets and seals needed for their rebuild. Quality gasket materials are a priority in StreetPro kits. Kit materials include: MLS, AFM, Aramid Fiber, and Armor Clad. This Part Fits: Year Make Model Submodel 1970 1975 Chevrolet Bel Air Base 1970 1972 Chevrolet Biscayne Base 1973 1974 Chevrolet Blazer Base 1970 1972 Chevrolet Brookwood