When you regrind lifters, you loose some length, which intern changes the rocker arm contact point on the valve stem. Well worn lifter that have been reground, could require longer pushrods to correct the rocker tip to stem contact point. This is an option for flat tappet lifters,
https://www.hotrod.com/how-to/comp-dlc-flat-tappet-lifters-reliability-upgrade .
Look at Johnson-HYlift, Crower Camsavers, and Rhoads lifters, all three make very good lifters, I have no idea if the fit 235's or not. White box, no label lifter sets are NOT what you want, no matter what price they are.
I'm in Lee's Summit, near Lake Jacomo if you need some tools or help,
Joe
