Big Block Gx390/420/440 billet head
45/36 titanium valves,
Ampco 45 seats,
Comp cams gp966 springs,
uses gx390 style rockers,
comes with custom exhaust flange,
comes with widened rocker shaft,
-must use aftermarket valve cover and spacer
Big Block Gx390/420/440 billet head
45/36 titanium valves,
Ampco 45 seats,
Comp cams gp966 springs,
uses gx390 style rockers,
comes with custom exhaust flange,
comes with widened rocker shaft,
-must use aftermarket valve cover and spacer