KB 600 block front cap

We are running a AJPE older wedge motor with a PSI srew atop. Using a RCD front crank support and iron front 1/2" stud main cap (2 only).
I have noticed there is a very slight amount of cap to block fretting, is there anything that I can do to prevent getting worse? Bearing seems to be ok. Using a anti galling compound between 2 surfaces?, torquing up studs a little extra (100ftlb currently)? pretending it it dont matter?
Cheers
P