[BigBlocksRule]

Forget the "spinning" the pushrod method, they'll spin even with the lifter on the lobe if there's a perfect fit between the pushrod and lifter and rocker. Rattle it up and down to feel the movement, zero is when you can't rattle any more, then go 1/2 or 3/4 turn down from there. If the nuts are backing off (mark some with yellow machinist's marker, recheck after a few miles), replace 'em.