Pop!

Fairly sure I've found the cause of the popping noise. As the offset intake rockers open they maintain clearance with the spacers until the angled pushrod has enough lateral pressure to 'pop' it loose. Any body ever notice this happen? All parts are new. I run 20/50 castrol oil and have a .050 restrictor in the oil line for each head. (Indy 440-1) The restrictors raised the hot idle oil pressure from 30psi to 50.