Doug,
Are you saying the 0.040" hole is exposed to the oil galley in the lifter bore? That is how mine are setup too.

I wonder if the stock large lifter hole on the side not exposed to the oil galley would work (no hole or plugged exposed to the oil galley).

I like how you did that plug Jim... did you get a
increase n pressure with that... also how big is the
hole in the galley.. I have bushed lifter bores with
a .062 hole... also do your lifters have the EDM hole
in the roller area... I think between the hole in the
side of the lifter and the EDM hole and using PR oiling
I get a pretty good loss at the lifter... I might try
the plug idea

Those are brass plugs and I used a 0.032" bit to drill the hole. The lifter oil galley is a typical large opening (not bushed). I never ran this motor without the plugs/holes so I don't know what effect it has on oil pressure. I don't think these lifters have the pressurized oiling to the roller wheel bearings, they are a little older than that (1 season use, but sat on the shelf).

No, the oil hole next to the galley is plugged. The hole on the opposite side is .040". Though not near as zoomie as yours.
Doug

I run bushed lifters, a .060 hole in the bushing, lifter holes are Comp with the hole 90 degrees from the lifter. Never looked at the hole diameter on the lifter. Pushrods are always full of oil, and with the added oil from spray bars everything looks great. I have restricters in the fittings on the outside of the valve covers.

Thanks Doug,
I bought a rebuilt set of offset lifters from a guy and they don't have an oil hole on the same side as my KB block oil galley. From your experience, they should work just fine. I guess there is enough pressure all around the lifter to oil thru the pushrods to the heads. The rockers don't need that much oil anyway (that is why all us racers are restricting it).

I'm going to put it to the test, I plugged the hole facing the oil galley. I'm going to fire it up tomorrow and see what I get.

Well, looks like it worked out great, 80 psi, just enough oil up top using the holes opposite the oil galley and the ones facing the galley closed. Was going to head to the track tomorrow - even bought a fresh set of M/T's, and now I have a rear main leak. !!!!!

Can you please tell me what did you use for the restrictors in those lifters and how difficult was it to fit them ?

I'd like to update. Since My last post I failed a needle bearing in one lifter (829 Comp 320/800 psi springs). They had 200 passes. There was nothing in the restrictors that wounded the lifter that I can see. Water soluble epoxy was used. A small amount was placed in the oil feeds then one hole was drilled .040". However I did notice that the epoxy that was used did not stay bonded to the metal. The epoxy "slugs" were loose in the lifter itself. They were trapped and could not exit. But I didn't like the fact that it was loose. Probably should have used JB Weld or a similar product. The pushrods and rocker surfaces all looked like new.
Doug

None, bushed lifter bores no holes... just spray bars with Jesel components.

Absolutely NO problems in the 15 years running this combo.

Oil spray is enough!