safer is better
when i doubt go to a place like howards cams or elgin or something and buy a cheap solid cam with close to the same numbers...may be impossible when comparing to a roller but its worth a try. most solid lifter stuff is 90 bucks from them. Or as an alternative. check with some local dirt track guys and see if they have a comparable one laying around you could use to test. Us dirt guys never get rid of anything.