yes they have been rubbing the head,mistake by me and engine assembler, they are 3/8s wall pushrods and have a larger cup size on top.the rockers i have are stock cast iron with the interference style adjuster...it has a small ball on them for the 5/16s pushrods small top cup. I have new crane adjusters with the small lock nut and new 5/16s proform chrome moly pushrods. should take care of that problem.
You will need to have the rocker arms spot faced where the jam nut tightens down or they will loosen up every time you run the engine through it's cycle.
Might be more cost effective to install the "offshore" rockers. With your mild cam and springs you should be OK
There's a set of Erson rockers on Ebay right now for $150 and I would bet you couldn't get yours machined for that price
Gus
