We have 1 used GM Performance Ported Chevy R07.2 Aluminum Head. These have 6 mm intake and 6 mm exhaust valve stem size. Head has no valves and They have been repaired and has epoxy in the intake ports as you can see in the pictures.
1 GM Performance Chevy R- 07 Ported Aluminum Head #17802715
2 GM Performance Chevy R07.2 Ported Aluminum Head #17802715-HENDRICK MOTORSPORTS
GM Performance Harmonic Balancer Steel 8.0" Diameter Chevy 383 1-Piece Seal
GM Performance 45 Degree Thermostat Housing Chevy SBC BBC V8 Natural 10108470
Bowtie GM Performance 12496822 Vortec 12486574 SB Chevy Aluminum Intake Manifold
