John,
Does your engine have the
oil restrictor kit installed? This restricts the amount of
oil going to the cam and heads. Sends more
oil to the mains and rods where it is needed. This is done when the block is being prepped before installing crank and cam bearings. Not a retrofit job. Most Ford racing engine builders do this. Don't know if it is done on the crate engines. My 351 crate did not have the restrictor kit. My new motor will.
Good luck,
Cranky