VEVOR Engine Cylinder Head Assembly Replacement, Aluminum Engine Cylinder Head Kit, Compatible with Small Block Chevrolet Engines, SBC 327/ 350/ 383, Corvette, Camaro, Z06

The outer spring is compressed to 32 at 905N and to 54.5 at 210N. The inner spring is compressed to 26 under pressure of 553N; Compressed to 131 at a pressure of 45N

Assembly Specifications Max Lift is 550 , combustion chamber volume is 62cc

They fit 1975 camaro 350 engine.

Intake valve is Φ8.6*Φ51.2*128, exhaust valve is Φ8.6*Φ40.5*128.

Yes, it works.