I have been running a set of pro comp victor knock offs for about 12-14 ish yrs now , they were fully cnc`d and set up , I did have to finish them and fit to my set up , shim the rocker arms , and enlarge the pushod ho;es..
Getting the pushrod clearance on the heads ended up being a ***** , took 3 times to get clearance .
Are you sure the pushrod holes aren`t shoving the pushrod off the valves ?
My procomps are pretty darn good heads. -flow 354 .600 lift , good street heads...