I'm getting to the party late....but based on what I have read ...u have a sledgehammer lpr. 2ks had em as stock. These don't have an adjustment in the nose llikenmore "modern" lprs. And based on ur last post...I'm willing to bet set too high. When they are too high..it won't cycle properly. Back blocks should be able to be pushed forward with medium hand pressure. I'm also gonna wager that ur timing rod to too far forward. Hoses on a Standard frame standard 3way are. Front/ front middle middle rear/ rear. Lower lpr....let's start there. Output should be 60-70 psi for a stock set up. Urs sounds like it above 90 if u cant push the block forward.