i have a 1980 z28 350 lm1. it came in a 1980 zed i bought. it has an edelbroc performer intake.holley 600.stock heads.keith black silvolite pistons .060 with a crane cam energizer 266. do i have the right cam?.the guy i bought the car from said it was a 305 and he put the cam in. he was obviously wrong!