[charlie66]

Originally Posted by Jay S

I have not seen that Isky HPx are available with Pontiac link bars. I assume your machinist is talking about the HPx. It would be great if they were available for a Pontiac, all it would take is a different link bar. I think the HPx lifters are completely in a league of their own as far as advancements. They are 7500 RPM lifters that can run spring pressures and 525 lbs springs. They have a bushing option also. They are made by Johnson in Taylor Michigan.

Johnson PR’s are limited travel and would work about like the Evolutions but they are not pin oiled and don’t have the advancements in the plunger feeding like the HPx. Isky and Johnson worked together to come up with the HPx and are more advanced than a PR. The PR will handle more spring pressure than an Evolution.

Isky gave me this part number but its not coming up 9077hyrt.

I'm so confused on what to do it's not even funny lol