Solid Roller Cam in a LA 360 and Edelbrock RPM Heads

AR_Tech said

II was told how a solid cam will act like it has 10° duration than a hydraulic cam.

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No idea who told you this, but that's exactly opposite of how it is. When comparing solids to hydraulics, it is the hydraulic that will "act" 10* larger with similar duration specs. Always been that way.