408 valve train noise

had block work done buy a small machine shop...I never asked to have lifter bores done so probably not. I have hughes roller rockers, sewing machine sound is ok, that TAP TAP TAP @ 2500 drives me nuts! I think I'm gonna put it back together and when it blows sell it for scrap. The geometry of a small block mopar is just stupid, why didn't they have the lifters so the push rod comes straight off them instead of such a BIG angle?