Thanks again for all the input. When this motor comes apart, there will be a lot of checking to do for sure. I do pull the dipstick and inspect for "glitter" often!
On the oil feed hole in the bushings they are perpendicular to the oil galley and down about one inch, if i recall correctly. I drilled them after they were installed in the block.

And if you get caught with your pants down like the failed gasket in the Milodon oil filter adapter plate, lie yer [censored] off! "What? We've NEVER had a failure there!"
Mine blew out in the traps at 150 mph. A real "fun" memory!

Greg, do you have a pic of your lifters that shows the pushrod oil feed holes?

Unfortunately, no. But they are the Isky EZ roll bushed lifters.i don't remember the oil holes being in line with my bushing holes, as that was a concern when i put them in.

One of my Isky bushed Red Zones. As I remember the feed hole goes straight thru from the other side as well. It is inline with the bushing feed in my motor.
Doug

Doug’s oil holes are like the Comp 892’s, and with the cam I had in that 572, the holes that were in the bushings with the block as delivered from Bill Mitchell, they lined right up with each other when the lifter was on the base circle of the cam.
And that will get you some serious oil flow to the top end of the motor.

Fundamentally, that oil hole placement is for a Chevy running .904 lifters.

I enjoyed that, thanks

So, with the distinct posibility that the holes line up in my motor, any ideas on how to restrict flow?

I had my Comp tappets restricted. The feed holes in the lifter were plugged. The side opposite the bushing feed was drilled .040". The problem was we used epoxy. Eventually the epoxy worked loose and slid back and forth in the feeds on some of the lifters. Never hurt anything. I think pressing a brass rod in there and then drilling might work. The funny thing is mine has huge clearance compared to yours, but has good oil pressure. Same lifters, block. maybe your lifter bushings are shorter uncovering a passage?
Doug

Greg I bumped an old post about lifters that may offer good info.

Thanks hardcoreb and DVW! Again, all this info is great. Lots to look at!