anybody know what the mac lift for a cam on an l20b would be before the springs bind, im not wanting to go with a race cam but i dont want a mild cam that will bind the springs. i read that the max for the z car engines is .460 lift and i was looking at getting a 490 for my motor, just wondering if that was too much? i dont want to sacrifice too much low end, i knwo some of you said you liked the 490 isky profile, did it seem weak in the <3000 range????