[tempest1964]

Originally Posted by P@blo

Gaterman lifters are a good quality made in China lifter. Another example of domestic not automatically being the best quality. Gaterman website states standard lifter not a variable duration. Around here no one has ever heard of the GP1012 being a VD lifter and appears to be an internet thing.

https://www.gatermanproducts.com/gm-lslt-drop-in.html

Just curious. I did a quick internet search and it looks to me like the Gaterman GP 1012 are not available at this time?

[P@blo]

Originally Posted by tempest1964

Just curious. I did a quick internet search and it looks to me like the Gaterman GP 1012 are not available at this time?

They seem to come in batches and you will have to keep your eye out. Retailers sell out rather quickly as well so they must be produced in limited numbers. The Gatermans I have are as nice or nicer quality as the Mexican HT2148 lifters I aslo have hiding somewhere.

[Stan65]

gtobob67,

67Lemons,

My 73 455 has the same couple of chamfers. My cam is ground with the top of the lobes .007” under the bearing journal. If they were at the same height as the journal the lifter fill holes still would not have came out the top, other blocks could be different and need verified. The lobes can’t be taller as the cam couldn’t be installed

The biggest issue is the lifter oil bad dropping below the boss on the base circle. As the lift gets bigger the lifter drops lower in the bore on the base circle.

If you can find out the base circle dimension and the lobe lift you can get a 95% chance of figuring it out before buying.

Pontiac cam journal specs are 1.8987 to 1. 8997. Use 1.899 for the diameter.

Lobe below journal = Journal diameter- ((2 x lobe lift) + base circle)

If you run the Howard’s/Gaterman lifters you will not have an issue with the lifter out the top on any block. The tops of the bore/chamfer would have to be an 1/8” lower than I have ever seen.

The only caveat is the modification ls to the oil feed galley.

The biggest area of concern is dropping too low in the bore.

Thanks,
Stuart “Stan” Landreth

[Stan65]

65madgoat,

The sealed power HT2148 lifters and the other but more costly are Howards (Gaterman) 91174

The Howards lifter is in the bottom .

If you use sealed power make sure the oil feed hole looks exactly like to one on the top.

Thanks,
Stuart “Stan” Landreth

[P@blo]

We should compile a list of cams that guys are using for this modification.

Great wotk Stan! Any seniors discount?

[Stan65]

Joog,

A lot of factors come into play to determine maximum lift such as base circle critical dimensions and rocker arm ratio. I attached a couple drawings giving some info to get you an idea.

If you are after a lot of lift this system is not for you.

Thanks,
Stuart “Stan” Landreth

[Joog]

Originally Posted by Stan65

Joog,

A lot of factors come into play to determine maximum lift such as base circle critical dimensions and rocker arm ratio. I attached a couple drawings giving some info to get you an idea.

If you are after a lot of lift this system is not for you.

Thanks,
Stuart “Stan” Landreth

This is going in my street strip car. cam with 1.5 lift should be .540/.563 and 1.65 should be .594/.619 Or slightly less if I can get a custom one ground

[Stan65]

Dragncar,

Quite a few sets on the road today. Scroll down a few posts for a couple successful installs.

Sealed Power HT-2148 lifters without modifications. There are a couple more with slight mods to the lifter boss oil feed hole.

I make the dog bones for this setup.

Thanks,
Stuart “Stan” Landreth

[Dragncar]

Originally Posted by Stan65

Dragncar,

Quite a few sets on the road today. Scroll down a few posts for a couple successful installs.

Sealed Power HT-2148 lifters without modifications. There are a couple more with slight mods to the lifter boss oil feed hole.

I make the dog bones for this setup.

Thanks,
Stuart “Stan” Landreth

What does it all cost ?

[Stan65]

Iggy,

That’s good. Can you share where you purchased them?

67Lemons,

That’s only .023” smaller diameter. That only drops the lifter .0115” lower. That would be fine in my block.

Thanks,
Stuart “Stan” Landreth

Down to 2 sets. Need to see how much the materials will go up with all this tariff stuff.

[Iggy]

I was able to get a set of ht-2148 lifters made in Mexico.

[Stan65]

Down to 4 sets get them while you can!

Stuart “Stan” Landreth

[69gtocv]

Originally Posted by Stan65

Down to 4 sets get them while you can!

Stuart “Stan” Landreth

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