my $.02....

sounds like the cam was developed for a 440ish CID 6bbl motor

not sure how optimized it be and how well it would perform in a 60-70CID smaller mill with a lot less carburation, that is intended to be run with a/c, etc....

IIRC his cams are custom ground based on engle lobes.

if it were me, for a street 383, looking at shelf grinds, I'd probably look at the lunati voodoo 60302 and comp #911 springs. o-lap and seat timing are reduced from the stock magnum cam, but .050", .2" duration and lobe lift are way up.