[Steve C.]

I know they are not for very high spring pressures

Do your homework regarding that subject.

"With proper oil pressure and the correct lubricant, the bushing cannot only last longer, but by spreading the load over a greater area of the axle, the lifter can support higher spring pressures."

https://www.enginelabs.com/engine-te...oller-lifters/

One opinion from the internet....

"Just a note on the EZ roll bushing lifter and longevity; the bronze bushing lifter is not really made for "street" longevity. They are very sensitive to oil contamination and they will wear. They were really designed to withstand extreme rpm and extreme spring pressure in an endurance app, but they are a maintenance item, not a drop in and forget item. You'd honestly be better off with a needle bearing lifter."

https://www.yellowbullet.com/threads...aring.1011354/

Note- I'm not here to specifically recommend a Isky product. It just so happens the comments involved Isky. Personally I used Crower bushed solid roller lifters at one time.
Currently street only, now back to Crower solid roller lifters with needle bearings.



.