Yes BG I have found that out the hard way many years ago, some of the cheaper off the shelf pushrods have the thick cup that does cause issues with some rockers.

I use Smith Brothers just for that reason as there cup material is not near as thick and cause less problems.

I think its time I try to make the move to the ball ball in the future since it seems its become more the standard.

I have been resisting going to the ball/ball mainly due to the lack of info and its hard to change when one gets older to newer trends.

I have a few modern motors yet to build and they are both Ball/Ball the R5/P7 is and I don't recall what the older my older Aries 8.3 tractor pulling motor has in them, I think ball cup as its semi old. Early-mid 80-s I think.

Thanks everyone for the input.

Thumper, I think you have a extremely well running motor combo and its proof of what well matched parts can do and last a long time.