So the 455 got bought before I could get it. Back to trying to fix the 350. Not getting oil to the rockers. Pulled the oil pressure switch and put in a manual gauge. 50psi at the bottom end. Brings me to can,lifters, or a plug somewhere. Does anyone know of a higher oil port on the top end of the block?
The one I had ( 72 ) oiled through the lifters and up through hollow pushrods to the rockers. I'd see if your pushrods are clogged. Very unlikely I know, but I have seen stranger things happen!
I soaked them in diesel, ran a wire through them, and then blew them out. Once reinstalled. I still had nothing