Walt, Doug's rollers are 1.6 ratio from ta-per. installed spring height was 1.6 with coil bind at 1.00. so he has .600 clearance - .521 cam lift and a .030 shim is .551 total. he has .049 before coil bind. it comes down to lifter bleed down, because of the fast ramp cam and small cam lobes of the nail head camshaft for the small cam bearings. the right lifters should cure the problem, like you said then the cam would be the final solution. turned into a big mess, comp sent him different lifters the first time for a Pontiac thinking that was the problem.in post #27 I mention the magnum pro lifters but Doug already ordered the buick lifters. like to see him go right to solid lifters with Toms approval and help.