Ours have been restricted to .029" and not any issues with rockers or springs. In fact the original rockers are still in the 525 with well north of 1000 passes onthem .Only replaced springs between freshen ups once usually at 200-220 laps only to error on the side of caution. They always pulled well when taken off honestly. Never broke one either. Had 1080 open pressure, usually were at 1045-55 when pulled. There is still a take off set on my Camaro now that's street driven and raced on occasion.
Tony and Al, do you have any pics of what you did to the oiling system?
I have pics, but cant get them on here. Its two dist blocks, one in 8 out. Every lifter bore is drilled and tapped for 1/8 pipe thread, they have -3 fittings. they are plumbed with 3/16 brake tubing. The inlet has a single .050 nitrous jet restricting it. works really well so far.
Also I noticed on his engine there are no drains up front. My heads are tapped front and rear for oil drains to get it back to the pan.
