Pre Magnum stock roller cam specs?

I thought .450 was the max for the pre-mag roller motors.

I also though the 318 cams were slightly more aggressive.
(Possibly due to slightly more compression in the 318)
(also might just be a magnum thing)

How about a cam from a magnum, with the snout adaptor?
I wonder if that would work.

Very difficult to find info on these motors (aside from the 302 heads).
I also wondered if there was any more aggressiveness in the early roller cams, or just for less friction.