[Tom Wells]

commercialcobb,

I need to offer a "disqualify" pill, as this is a bit outside what I know. What follows is guesswork...

I've seen stock 460s cough up a pushrod by bending it. Replace the pushrod and go usually works. These engines have stock rocker geometry and hydraulic lifters.

Your engine has aftermarket rockers and hardened pushrod guides. You don't say whether the cam is solid or hydraulic.

In either case, the pushrod length is critical. Also, the pushrods need to be hard enough to be compatible with the guides. Stock parts won't work. Likewise the placement of the hardened guide plates is critical. On my engine the plates had to be split and tack welded to get proper alignment.

Bottom line: you need someone who knows custom pushrod/rocker/guide plate assembly to look at your setup and advise you.

Tom