Update:
Ran the oil pressure test again. It pumped up to 40 psi and held there steady through varying drill speeds. I was surprised at the load the oil pump was putting on my 3/8ths drill. It took a while before I got oil out of all the rocker arms, bit once the rocker shaft was filled it didn't take long on subsequent tests. So far no oil leaks (knock on wood).
Finally got the header/manifold clamps sorted out and bolted up. I had to add a piece of 1/2" angle iron to the clamp at the 1/2 ports,(saw that trick here in another post), ground alittle off one side of the clamp at 3/4 ports and turned the small clamp sideways to fit at the 5/6 ports.
Ran into another situation with those Fenton headers. The rear header is obstructing the vertical throttle rod preventing a straight connection between the carb and throttle bellcrank. The rod will either have to be bent around the header somewhat or replaced with another with some the bends installed.
I'm interested in how others worked around this.....
Angle iron & clamp at 1/2 port Ground clammp at 3/4 ports Wide gap with throttle linkage at carb 
