[68hotbird]

the ht 2148 sealed power lifter works with the hr276 cam I have in my motor. I have not test fit it yet but I have an hr288 I'm going to try next. That last picture with the lifer with the oil hole above the bore looks like the ls7 lifters that I purchased. If they will grind the cam on a smaller base circle the ls7 lifters will work. One thing I will caution is that there are several manufacturers of lifters that use the same part number for small block and LS engines. They will interchange in the chevys with no issues but not the Pontiac. I also have some knock off 2148 lifters that also wont work. The only ones I know for sure right now that will work in my combo is the sealed power branded 2148 lifters. Again this is a cost savings and a reliability project but you must check everything out to verify it works. One thing I noticed that you really have to watch is I have 5 Pontiac blocks in the shop right now and there are several lifter bores that have a chamfer at the top of the bore and some do not. You have to look and measure the chamfered ones to make sure the oil hole is still covered.

[Scarebird]

I tested a full base circle roller cam I have and noted that the 60° V6 lifter does not come up far enough out of the bore to properly engage the dog bone at lowest level - only 80 thou sticks out, so I cannot use this solution.

[70GS455]

They are doing the same thing using factory lifters and spiders from the later 3800 GM V6 into the earlier grand national V6

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[Navy Horn 16]

I've used Howard's HYD roller lifters...run em for 5+ years really hard with no problems.

[AG]

Originally Posted by Navy Horn 16

I've used Howard's HYD roller lifters...run em for 5+ years really hard with no problems.

Howard's for Pontiac?

[HWYSTR455]

Originally Posted by AG

Howard's for Pontiac?

Re-boxed Morels...

.

[ponjohn]

Here ya go 350 bucks on facebook marketplace.

Includes cam and timing gear set that won't be used.

[242177P]

Originally Posted by ponjohn

Here ya go 350 bucks on facebook marketplace.

Includes cam and timing gear set that won't be used.

Gonna need a BIG hammer.

Ford ------> .875
Pontiac --> .842

[hurryinhoosier62]

Originally Posted by 242177P

Gonna need a BIG hammer.

Ford ------> .875
Pontiac --> .842

.033 can be reamed, then honed out of the lifter bosses.

[Formulajones]

Originally Posted by hurryinhoosier62

.033 can be reamed, then honed out of the lifter bosses.

That's where I'm going to start to lose interest. As more things have to be modified the costs start to go up and the difference between this and a retrofit lifter starts to come closer together.

Plus you're modifying the block beyond no return which makes it useless for stock stuff, and it's not something most here would want to convert over if it requires now taking the block to a machinist just because a guy wants a roller cam.

I'd only be interested in this type of deal if a drop in lifter can be found to be used.

[hurryinhoosier62]

Originally Posted by Formulajones

That's where I'm going to start to lose interest. As more things have to be modified the costs start to go up and the difference between this and a retrofit lifter starts to come closer together.

Plus you're modifying the block beyond no return which makes it useless for stock stuff, and it's not something most here would want to convert over if it requires now taking the block to a machinist just because a guy wants a roller cam.

I'd only be interested in this type of deal if a drop in lifter can be found to be used.

What is the difference between reaming lifter bores to install bronze bushings to correct lifter geometry or reaming then honing a lifter bore to install larger diameter lifters? In my opinion there is none. IF someone wanted to return to the OE diameter lifters it would be a simple case of installing bronze lifter bushings to return the bore back to standard size.,

[Scarebird]

Originally Posted by Formulajones

That's where I'm going to start to lose interest. As more things have to be modified the costs start to go up and the difference between this and a retrofit lifter starts to come closer together...

Kinda hard to do with a assembled motor in the car also.

[68hotbird]

The ht2148 sealed power lifter works. With the ford style dog bone and a .335 lobe lift the barrel does not come up far enough to hit the dog bone. This would become an issue if you added another .040-.050 lobe lift or more. Just more info.

[Formulajones]

Hmm, all the rollers we run are over .600 at the valve or around .380+ lobe lift so that likely won't work.

[Formulajones]

Originally Posted by ponjohn

Here ya go 350 bucks on facebook marketplace.

Includes cam and timing gear set that won't be used.

I posted earlier I've bought brand new dog bones, spider, and roller lifters from Ford Racing for just $175. So that price seems a bit high, even if it were new.

[tom s]

Simple yes,just numbers in a check book!Not small numbers.Tom

[hurryinhoosier62]

Originally Posted by tom s

Simple yes,just numbers in a check book!Not small numbers.Tom

Agreed, Tom....for most folks. I have access to a Bridgeport mill.

[JC455]

https://www.summitracing.com/parts/cca-31-1000/

Spider and dog bones from Summit Racing.

[Scarebird]

It is, I have a spare HT2148B. This seems to be the go to lifter for corporate motors since the SBC went roller in 87. To me of equal concern is the the main barrel of the body also pops out of the bore - this would wreak havoc on the dogbone!

I tested this with a Summit 2801 cam (yes, it is a flat tappet but I figure the base circle and max lift would be the same).

[t money]

I found this on rockauto today this is think outside the box can the engine tech RFC45416 work with some work. Same .842, a oil hole with no big scallop that can be exposed at full lift. If you drill the Rivets to remove the bbc link bar , it has the flat part of the upper part of the lifter for the dog bone system (replacing the link bar)and if needed look like you can shorten it a little. 24.99$ 2 lifter and link bar. I’m sorry I can’t post the photos. Maybe someone can help.