Reworking the 273 Adjustable Rockers
These rockers don't work on W-2/5 heads or Gen II hemis either. I am sorry your having so much trouble. Maybe you should try some X or J heads with the 273 rockers modified like I'm doing.
The grove in the bottom of the rocker arm shaft is to spread the oil out over a larger area than just a hole provides because ALL the force of the valve spring is against it at that point.
You are not getting what I am saying.
You can modify and drill all you want. To get the oil correctly on the pushrod and ball, the oil hole in the rocker arm MUST line up with the oil hole in the shaft. It IS that simple. I have never seen an original 273 rocker shaft. I have only had DC or MP ones, and at one time I had some Isky shafts. Not one of them had the oil holes in the correct location.
Again, the ONLY way to get the correct oiling to the pushrod cup/rocker ball, the oil feed hole in the shaft MUST line up with the oil feed hole in the rocker.
This means that whoever is assembling the engine must, MUST mock the head up and physically LOOK to VERIFY the holes are lined up. This is with the rockers on the shaft, the valves in place at the correct installed height, and the adjuster removed and look at it. If you can't see the oil hole in the shaft you need to figure out why.
I have written EXTENSIVELY on this, tried to get it published on other than internet forums, and actually sent in drawings to Chrysler with measurements to see if they would correct and publish the information.
They told me it is the final assembler who is responsible for correct oil timing. Chrysler will NOT admit that for DECADES they have been selling incorrectly machined parts through it's racing programs. Neither will they publish ANYTHING in reference to it.
In my opinion, you can't build a performance engine with out checking this. I know there are thousands and thousands of cars out there with rocker systems that have not been corrected. But eventually, luck runs out.
I am very dogmatic about this because of the costs I incurred sorting out what should have been engineer by Chrysler. It should be a routine check on ALL Chrysler engines, just like P/V clearance or bearing clearances. And corrected when found.