What rocker shafts are you using, do they have 'banana' grooves or just oiling holes ? In my experience non banana shafts will turn pushrods and other parts blue every time.
I used a set of MP rocker shafts that I bought as part of the MP P4876343 W2 rocker arm set.
Now, these were non-offset, I measured this out, it was one of the first things I did. The shafts only had the oiling holes, I wanted to put the banana groves on them, so I did.
I replicated what my Hughes Engines banana shafts looked like (this is what I'm using on the 1.5 roller rockers), including the width of the banana grove itself. I then removed the end-plugs, cleaned them up, re-installed (new) plugs. Maybe this is causing the problem? I do not see how though, all rocker arm pairs have between 0.005-0.010 side clearance, nothing bigger than that.
