jim what lifters did you use? i know you said oem and from my understanding all lifters now for lt1, ls6, etc etc or the ls7 standard lifters. Not the caddy "race version". And what size rocker stud are you using ?
sorry for all the question but im in the same boat right now. Im using a solid lifter(ls7 lifter with spacers) and adjustable pushrod with 7/16 studs and 1.6 comp nsa rockers. My engine builder told me not to use to much preload on the new ls7 lifters. so im just trying to make sure i understand all this.
another note theres alot of opinions on preload for the ls7 lifters. i see everything from .03-08 preload. I however always recommend what your builder says.