i think its blowed

Here's some articles you can start by reading. http://www.hughesengines.com/Upload/productInstructions/RockerArmBundleinstructions.pdf
http://www.hughesengines.com/Upload...ngth_checking_pushrod_instructionsAug2007.pdf
http://www.hughesengines.com/TechArticles/501rockerarmsgeometry.php

Even though these are for Hughes rockers the set up and end result are the same as far as rocker roller to valve stem contact is concerned. Yes you will have to have a custom length set of push rods made.

Terry

Terry