Did you find the problem yet?

I'm only interested because I'm currently putting together a Predator Motor. Different set-up pushrod oiled no spray bars and bushed lifters w/.025" holes in the bushing. The block is coming from KB and should be here in the next 30 days. 45* raised cam w/ predator top end. 596 CID 4.625" stroke x 4.530" bore.