GM crossram cam

[Big Block Bill]

Not to steal your post, but does anyone know what the difference is between the 3965754 - 302 Z-28 Camshaft and the "140" Camshaft? I was told the 3965754 was a 2nd. design 302 Camshaft and the 140" Camshaft was an "Off Road" only Camshaft only but I never knew if that was true. I had a 3965754 Camshaft in a .060 350 that had a Tunnel Ram with dual Holley 600 CFM's on it and it had little to no vacuum @ idle. I had to convert the 1967 Chevelle it was in to non-power drum Brakes just to drive it on the street (But is sure Looked Cool). Ahh, young and stupid, those were the days! Bill