Rebuilt my grandson’s Dodge magnum 360 engine (2003). New heads and cam along with new lifters. We have a problem with a couple of lifters that won’t charge with oil on one bank. Replaced the lifters and it did not cure the issue. Precharged the second set with oil and they would pump oil for a while and then quit. This thing has been apart at least four times chasing different theories like lifter bore issues. The last one I threw new valves, rockers and pushrods with no luck. Is it possible that the new head is the issue. Something not right with the geometry? The original heads were cracked between valve seats so that is the reason for replacement.