I've been scratching my head alot the past few days.... I have trickflow 225's milled to 61cc with powder metal guides, stock .051 gaskets, stock rockers with the trunion upgrade and using johnson 2110 lifters.... I've measured 3 different rockers and I know for a fact I'm on the cam base but I get 11.1-11.3 turns on the pushrod length checker which equals 11.2x.05+6.80+(.050 pe load) and I get 7.410.... that sounds super short for a head that normally requires a 7.500 pushrod...