Double Lip Offset Rear Main Seal for 1959 - 1979 Chevy 305 350 400 SBC

Enginetech 2 Piece Rear Main Seal Application Fitment 262 CI : 1975 - 1976 267 CI : 1979 - 1982 283 CI : 1959 - 1967 305 CI : 1976 - 1979 307 CI : 1968 - 1973 327 CI : 1962 - 1969 350 CI : 1975 - 1979 400 CI : 1975 - 1980.