Crower Valve Springs - 604 Crate Engine 68135-16

Willys Carb 604 Crate Engine Total Perf Kit 604CrateCarburetor - GM604 Power Kit - 4-Barrel - 750 CFM - Square Bore - No Choke - Mechanical Secondary - Dual Inlet - Fasteners / Gaskets / Spacer /...

Willys Carb 604 Crate Engine Carb Wcd50127Carburetor - 604 Crate - 4-Barrel - 750 CFM - Square Bore - No Choke - Mechanical Secondary - Dual Inlet - Chromate - Each

Crower Valve Springs - Dual 1.405 68404-16Valve Spring - Dual Spring / Damper - 338 lb/in Spring Rate - 0.950 in Coil Bind - 1.405 in OD - Set of 16

Crower Valve Springs - 1.045 68195-16Valve Spring - Single Spring - 251 lb/in Spring Rate - 0.860 in Coil Bind - 1.045 in OD - Set of 16