When there is a 'soft' center cam bearing problem, the right bank does starve for oil first. Soft babbit cam bearings typically go at least 200 miles before pinching off the oil supply to the right bank first. If the right bank did not oil from the git go, then the other possibility is that the cam bearing was not clocked correctly in the center location meaning only two of the holes in the cam bearing are aligned with the holes in the block.
In your case where you get no oil from the deck with the head off, I suspect the cam bearing is clocked wrong. There’s still a chance that the hole in the block itself was not cleaned adequately which can be verified by simply taking a drill bit or long rod pushed into the oil hole and seeing if ‘crud’comes back out. If this is the case, then the possibility is there that this stoppage can be cleared out without completely disassembling the engine.
For those of you that are in the process of doing a Y rebuild, there are some different modifications that help to insure adequate oil flow to both banks. Any of the following will work.
- Machine the cam journal groove deeper. This mod does require that all three holes in the cam bearing still align with the holes in the block.
- Use an outer grooved cam bearing set. Schumann sells these.
- Machine the center cam hole in the block so that all three holes are interconnected. The stock cam bearing simply presses in place over this modifation.

Lorena, Texas (South of Waco)