Ok did not know that TF heads were only shaft
HR Magnum Short block
? how are you getting oil to the shafts- I recommend external from the rear of the block to the back of the heads and blocking off the cam bearing oiling by rotating the bearing- get more oil to the mains and rods this way
Is your block drilled for traditional LA block oiling- early magnums were but external is easy to do
I would also oil the rocker adjuster balls or cups with pushrod oiling
I liked cups on the adjusters and ball and ball pushrods- but others disagree and I need to find out why
you have some good recent comment from YR and NM