if you going to get new ones, get the thick wall pushrods... Manton has the bets prices usually and they are the best you can get. You can get stage III .120 wall for about $200 shipped....
Heck Indy wants $180 for a set of there cheapo, cut to fit .080 walls, and your still going to make them.
I used Manton, for the 572 Hemi, and for the 560 CID wedge... both had Pacaloy springs, solid roller cams, with 800 lbs open pressure... I turned that wedge 8K a few times.