[Barry_R]

We use, stock, and recommend the Erson setup quite often for moderate builds. I have run them with up to 600 lb springs with no failures to date. There are a couple things to pay attention to.

First is that you need to use the AN washers supplied by Erson even if you choose to run studs for mounting - a standard large diameter washer will hit the rockers.

Second is that you will need to mark for and grind/machine reliefs on the bottom of the mounting stantions if you are using head studs instead of bolts.

You will want to restrict oiling (+/- .090) since the needle bearing design will "bleed" more than a traditional FE bushing style rocker.

Make sure to lube the roller tip for initial startup. Spray will take care of it from then on - but the tips are not directly lubed.