new generation small blocks and old small blocks are different all the way around.....can't use the same specs in comparasin to camshaft selection because of the differences in the motors them selves....sounds to me you are on the right track in sticking with GM grinds......your motor will scream with the factory camshaft.....going up to .570 lift wouldnt harm anything on your combo.....but again comparing the old small block to the new generation is not going to work....hope this helps and when you get the chance post some track times........you should have an awesome 60' time......