priming the oil pump

Test the hole in the deck that goes down to the cam bearing. Use an air nozzle to blow air thru the hole in the deck, down towards the cam bearing. It's possible that the RTV could have stopped that hole up, or the oil hole in the head that goes up to the rocker arm stand. If air won't blow thru to where you feel it by sticking your finger in the bearing area, it is either stopped up with RTV or the cam bearing is turned wrong in its bore. Run a stiff wire down thru the oil hole in the 2nd rocker stand from the left (exhaust ports facing towards you) and see if it comes out the deck surface of the head. If he gobbed the head bolt up with RTV and it got pushed up towards the rocker stand by oil pressure, it could be stuck in that oil passage in the head. That rocker stand will have 2 holes in one place, is the only way I can think to describe it. The oil hole is kind of off to the side of the hole where the bolt that holds the rocker shaft down. It connects to the hole in the deck of the block, that goes down to the cam bearing. See what you can find, if the above makes any sense. Sometimes what I hear myself saying in my head doesn't equate to what my fat fingers type....lol.