Planning a 526 stroker build using an Indy aluminum block. 440-1 345 heads, solid roller. Am looking at having Harland Sharp make some 1.7 rockers, which they will for the same price as 1.5/1.6. But also wondering about keeping the shaft oiling and running pushrod oiling as well. I was planning on using the AMC Comp lifter 861, then pushrods with a .040" restriction. Also using a cup adjuster and ball/ball pushrods. Is that all I need to do? The adjuster doesn't need to have an oil hole does it? I just want more oil to the pushrod ends/adjuster cup.

My current 518 C.I. S/P bracket motor had both pushrod oiling and spray bar oiling for the Jesel paired shaft rockers on the 440-1 heads, I ran it that way for a while and ended up removing the spray bar covers after having a lot more oil get into the vacuum pump with the other motor in it for five years with full time oiling to the Harland Sharp single shaft rockers restricted to .040 to each rocker shaft.
The Jesel paired shaft rockers oil straight through the adjusters with no oiling provisions to the shafts or roller tips, Jesel tech. said it will oil fine with splash oiling only to those parts It has so far shifting at 7300 RPM and crossing the finish line in the 1/4 mile over 7500 RPM Ask Harland Sharp to use pushrod oiling adjusters in your set If they won't you can buy them direct from Manton, I'm a Manton dealer also
Try it first and see how you like it and then decide to keep it both ways or not

No you wont need the rockers set up.. just the push rods .. your lash will get the oil onto the rocker rollers
and your running standard oiling also so you should be set

.040" is as big as I would go. Many Indy heads oil through a single .040" orifice. My Indy -1 motor push rod oil's. With 16 .040" orifices and spray bars you may want to look at a high volume pump. Though my push rods are .055" if I did it over they would be smaller.
Doug

The 861 lifters have edge orifice oiling and the correct clocking of the oil feed hole....... so no restrictions to the top end in the pushrods are needed.

Thanks for the replies.
I am also going to use cup style adjusters and ball/ball pushrods. Do I need adjusters with thru oiling?

I am running both oiling, I do have the oil through adjuster T&D rockers Ball Ball push rods 5k miles street & strip.

So this build is nearing completion, and the person assembling the top end has some concerns.
It is an Indy Maxx aluminum block, lifter bores are not bushed, they are aluminum. With the 861-16 lifters he thinks that the lifters cannot receive oil to feed the pushrods with just the lifter to lifter bore clearance. He thinks that the lifter bores needs to be drilled to feed the lifter. I said that they don't.

It was planned to use cup style adjusters and ball/ball pushrods, but he insists that will not work, that we need ball adjuster and cup/ball pushrods, as the pushrod oiling will not work without a pressurized oil feed hole in the lifter bore to feed the lifter.

Is there something I am overlooking in this?

I assume you had the option for lifter oiling done to the block.

If the way the lifter bores are oiled is similar to stock, no mods to oil the top end is necessary when using the 861 lifters.

Unless other modifications have been done to the HS rockers to facilitate the oil getting from the pushrod into the rocker arm, the only thing you’re accomplishing with oil going up the pushrod is improving the lubrication to the adjuster.

I do not know what was done to the block, my friend bought it 2nd hand, it had been prepped to use, but never was. Is the Indy block the same as factory for oiling the lifter area?
All we are looking to do is have the pushrod tip oiled, in addition to the standard rocker shaft oiling.

The way I understand it, You have to order the Indy block for pushrod oiling (cost additional). Otherwise the lifters don't have an oil gallery, just splash oiling.

Correct.

Ok, so if that were the case, no oil gallery, would the hi pressure pin oiling of the 861 lifter not receive oil either?

Correct. No pressure means no pressure. The 861 lifters will just have splash oiling if the gallery isn't drilled so no pressure for the pin and no pressure for the pushrod.

It will only require a visual inspection.

The lifter bores either have oil feed holes........ or they don’t.

I’ve only used one Indy block, and it didn’t get the lifter bore oiling mod.
No oil holes in the lifter bores.

Ok, thanks for the answers. Can this mod be done to the block as it is with the unbushed lifter bores, or do the bores need to be bushed and the oiling mod done? And can this even be done to the block if it wasn't ordered with it?

You would need to talk to someone like Best Machine. It takes some special equipment to drill a straight hole that long thru a block. Not a DIY type of project.