I can get you the specs for most cams. Your cam builder will want you to spec your cam as it sits in your motor, so break out the dial gauge. $60 is real cheap. I'll be gettin his address off you if he does good work. My guy here wants $130 minimum and I think he's lacking a bit of expertise in custom grinds with ramp rates, follower radius and stuff.

High velocity porting IMO is better. There are no losses down low, gains if anything. Beauty is that if you don't like it, you just grind it back out.

2 thou will affect nothing. Only clean the surface. If a decent amount was shaved off the head, then the cam will need to be degreed in and timing mods made if needed. A reground cam can be made to suit if you know what your doing.