Valve to piston clearance

….did a little math.. even if the cam is in straight up, those reliefs are deep enough for your cam/exh valve/pistons to miss, but not by much. .030"
If you were installed at 104° you would widen it another .018" to get .048. Not enough
Unfortunately, the spec sheet doesn't list what valve sizes the reliefs were cut for... could be the issue.
Your cam is right in line for those heads. although I am surprised it isn't on a bigger lobe.
Please let us know what you find on the cam position.
Take up yellowrose's offer.. he'll do you right.