After putting the cam and lifters in my 499 build, my engine builder noticed the holes for pushrod oiling come out the lifter bore slightly. This is with Comp 892 lifters. I know some of you guys have used these successfully in an unbushed block. Did your lifter bores also have enough chamfer that the oiling holes were exposed? I'm obviously concerned with oil pressure and I'm trying to explore my options since I'm not real keen on spending $800 to bush the bores. Is there a better lifter to use; maybe one where the oiling hole is just slightly lower on the lifter body? I'm all ears for what you guys have had success with. Thanks!

829 lifters?? The 829 is the standard Mopar lifter. The 892 is a generic 0.904 lifter which may or may not work in a Mopar block. I've never tried the 892 in a stock block but they might work in a World block.

Sounds like you're into an R&D project. If it just the pushrod oiling hole then it might not matter if it is exposed at max lift. That just means that the pushrod oiling would get cut off for a few moments each cycle. It will not have anything to do with oil pressure since that hole isn't connected to pressure.

Are you trying to pushrod oil the rockers?

You may find that on the base circle the oil holes in the lifters for the pushrods are exposed to the oil gallery, and if that's your situation, it will flood the top end.

Thanks for the input guys. They are the offset 892 lifters for pushrod oiling and this is in an unbushed 400 block. I was told about the pushrod oiling hole barely coming out of the bore at max lift. I'll have to inquire about the hole being exposed to the oil galley on the base circle. I imagine that is why I've read of people restricting that hole in an unbushed block. Perhaps they will chime in, but I believe Comp told Cab to jbweld the hole exposed to the galley and 440jim put a plug with a small hole in each pushrod oiling hole. Part of me wishes I saved a couple grand and just threw some TrickFlows on this thing.

Have you determined if you actually "need" the offset pushrod seats?
If not, I'm pretty sure you can use amc lifters with mopar link bars for pushrod oiling, or switch to 87019 lifters(for the offset without pushrod oiling) and run the spray bar valve covers.

If you put restrictors in the lifters, the feed holes should be pretty small.

Dwayne, the spray bar valve covers are something that have crossed my mind. I haven't actually mocked it all up enough to see if the offset pushrod seat is needed. I just figured it was a good idea to clean up the pushrod angle.

I'm sure it's more beneficial on the low deck, but I've put several tall deck 440-1 combos together with std lifters......no fit problems.
If the offset isn't needed, the amc lifters should take care of the pushrod oiling, unless even those expose the holes at full lift.

For a cheap set of pushrod oiling lifters I use the Comp AMC lifter (848 or now 861). Those work in a stock block up to about .460 lobe lift. For a more expensive lifter I would use the Crane pushrod oiling lifter. It works up to roughly the same .460 lobe lift. Maybe a little more, depends on the block casting I suppose.

I've never used the 892 lifter so I don't know if it works in a stock Mopar block or not. I do know from 30 years of experience that not all aftermarket parts work in all applications!

I learned the hard way that Crower pushrod oiling lifters didn't work in a stock block even though the sales guy swore that they would work. And the same guy said they couldn't take them back once they been installed in the engine.

IMM had pushrod oiling lifters that worked in stock blocks that also had offset seats. Not sure if those are still available or not. Best Machine also had a source for those lifters.

It looks like I'd be right on the edge since I'm at .460 lobe lift on the intake side. For those that have put -1s on a low deck, how ugly is the pushrod angle with a centered pushrod cup?

Sounds like bushing the block might be the easiest
and cheapest way in the long run... if you are paying
$800 thats way more than around here.. I just had a
block done a year ago... $500

You should probably mock it up before you make a decision. I used the offset lifters from IMM for one low deck build and they seemed to help a little bit but it is also another complication that you have keep track of.

This is a constant area of frustration for Mopar guys. I built myself a little tool a few years ago that shows me the relationship of the oil gallery to the holes in the lifter. I use this tool to double check if the lifters are going to work or not. I'm sure other engine builders have similar tools.

Now that's a great looking idea Andy !
With the stock blocks, it sure beats the heck out of all that finagling / measuring !
Alas,
I keep finding variances in where the damn Oil gallery intersects the Lifter Bores, sometimes even on the same bank as they drilled from either end to meet in the middle ?

That tool does an excellent job of illustrating how you end up with the problem of over oiling the top end when the pushrod feed holes are perpendicular to the axle.
It's a direct shot from the oil gallery.

Thanks, Andy and Dwayne for all the info. Andy your tool really illustrates the problem as mentioned. I'm thinking I'll mock it all up and see how the pushrod angle looks with the centered lifters on the intake side. If it's not too bad, I'll lean towards the 861 AMC lifters. I know a member here had a set of the IMMs I could have bought, but I don't want to get a lifter that isn't available any longer. With the cam I'm using and my inteded use, I'll be swapping springs and lifters every 2 years to be safe.

I think that Morel builds an offset pushrod oiling lifter for BB Mopar engines but I've never used them. Might be worth a call though. You just have to be super careful since a lot of sales people don't have the knowledge that exists in this thread. Almost everyone in the industry thinks in terms of Chevy engines and how they oil the lifters and pushrods.