Lifter problem

[John Pasinski]

I just overhauled my 402 including new hyd. lifters. I guess I may not have broken it in properly or didn't use enough assy. lube; but I cupped out my #1 exhaust lifter. Well I'm also having a problem with that particular lifter, and the #5 exhaust NOT pumping oil. ALL the others are pumping fine. I've R/R both lifters w/new units. Adjusted all the valves again, and still no oil on those two individual rockers. ALL the rockers are moving 1/4" up & down. So they're operating fine. Is it possible for 2 lifter galleries to get clogged at the same time? I don't know what else it could be. If they may be clogged, can I shoot air back through my oil pressure gauge fitting (on the block) to clear them? Any other suggestions before I pull the intake ONE MORE TIME!? Thanks all................