The return passage is enlarged at the junction where the bolt passes through.
The return tubes on the rockers are functional and flowing the excess oil.
I don't know about the pump, but it looks like any other.
The car has an idiot light for oil pressure, I haven't put a gauge on it.
I'll surely get back if I tear into with what I find.
Thanks again
Gene

...hmmph...

It seems that if the return passages are somewhat blocked by the head bolts, that Engineering would have allowed for that.

Two questions to ponder-

1) Were the oil return tubes on the rocker assemblies modified to lessen return flow, and

2) Any chance of the builder using a HV/HP oil pump?

Have you measure pressure with a quality mechanical oil gauge?

When you go into forensics and discover the problem, please return to this thread to post your findings.

GOOD LUCK with it!

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I dug out a set of heads that have been up in my shop attic for about 30 years to check out how the drain holes meet the block. I found that the return oil has to go around a head bolt that runs down through the drain passage. That is the reason only a small wire will pass. I guess I'll have to accept that IF the oil is coming by the guides I'll have to pull the heads and get them reworked. If I go that far I'll think about a larger Y block or a 302. 

Thanks for all the suggestions and ideas. This site is the best.
Gene

I do believe the gasket is partially blocking the drain holes. The head gaskets have the corner exposed on the upper front corner of the heads, which I understand indicates that they are installed correctly. There is no sludge there. The rockers are not pressurized, the tubes are open

There is your problem, slow drain-back. You mentioned you park it on a grade and at start-up she smokes out the right pipe.

You need to run a brush (think rifle brush) down the drain holes. How they can be sludged/blocked so soon is beyond me. Maybe something wrong with the head gasket install?

The umbrella type seal rides on the valve stems. When they come up, the stems/guides receives lubrication. Your problem it seems is flooding. Did you modify/pressurize the rocker arm shafts on assembly?

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Thanks Miker, but right now I think I might need to get more oil out through the oil tubes, or get the oil from the rockers out of the valve cover area faster. I know the oil will thin some/drain faster when it is hot, but the engine will be pumping more oil at higher RPMs. 

Tedster, just to be sure we are talking the same thing: The restriction I am talking about is at the drain holes at each bottom end of the heads. This is allowing oil to build up in the heads under the valve covers. Are you talking about the dogleg in the oil SUPPLY to the rockers? I'm not defending this "rebuild", just trying to get to the source of the oil burning. I'll do what I have to do, trying to diagnose it now. Thanks for sharing your knowledge. 

If you’re filling the head with oil, it’s a drain deal. The dogleg is the pressure side up from the cam bearing. Sounds like you’ve got good oil supply to the rockers, and that’s the important thing. I didn’t go review this whole thread, but there’s been a lot of discussion here about restricting the oil tubes out of the rockers. Either tapping a drilled set screw, pinching the tubes etc. Might run a search for that.

miker
55 bird, 32 cabrio F code
Kent, WA
Tucson, AZ

There is dogleg in the heads, this is the source I Suppose of the poor oiling inherent to Y block, at least with the substandard oils of the day. It was a known problem. Anyway a wire is unlikely to make it through. Some have suggested forcing grease, others compressed air, to clear blockage. Make sure both sides have good oil flow. If you check rocker shafts and rocker arms they are almost certainly trashed if oiling has been a problem. "Rebuild" means something different depending on who ya ask, I'll tell ya that.

Thanks. The seals are present. I ran a piece of wire about .115" diameter in the drain holes. When it gets to the depth about where the head gasket would be I have to force it through. It seems as if the drains are restricted. With the engine cold I started it with the valve covers off. Oil fills the bottom of the head to just before running over the valve cover gasket which is stuck to the head. I'm wondering if the restriction in the drains would allow the oil to build up in the valve covers at higher engine speeds and flood the stems? Should the drain be restricted or wide open? I'm grabbing at straws to hopefully keep from pulling the heads.