Overlap and centerline always dictatate your values when it comes to "How much compression" shall I run. Cubic inches will help settle things down. Whan a small-blk racer (driver/owner) has to deal with these issues, they're searching and experimenting. A smaller cubed motor needs a touch more compression to stay with what the bigger cubed motors need to achieve idle quality and rpm performance that bigger motors enjoy. Many cams that "share" the same specs as a big inch cam runs need to "squeeze" a bit more compression to "feel" right to get qualities that are similiar. Experience teaches us all to learn where we need to get our specs right. Overlap and ramp speeds dictate so much to the application. Lift and duration are not all that is important. Cam gringers are pretty generic and even a phone call will not give the answers you're looking for. Dig in a little bit with looking for the grind will produceyour desired results. Too many mouse motors are doing the job and too many hobbiests are scratching heads" wondering, "what if".