In Frame rebuild, Pistons, Liners, lower bearings, and rebuilt head. 40 psi oil at idle. Verified port from oil pump to rocker assembly clear. Only small amount of oil to rocker assembly when running. Had to run copper line from oil sensor port to the end of the rocker assembly to get better flow. Works, but not like I wanted. The only thing I can figure is that the cam bearing is worn allowing too much oil to weep by so it never makes it to the top. The funny thing is that the tractor has been running with minimal oil to the rockers for years. I just never noticed until I ran it without the valve cover. I really don't want to have to split the tractor to get at the cam. Any useful advise is welcome.