FEL-PRO 1204 Intake Gaskets for 1957-1986 Chevy SB 283 327 350 400 w/stock port
P/N (2) P903221. These intake gaskets will NOT fit the 1990s LT1 nor the LS-series engines. The end seals and distributor gasket are not included. FEL-PRO GASKETS. Port Size: 1.23-in. x 1.99-in. Cast iron & aluminum heads with conventional port ad bolt locations.