I got a set of adjustable pushrods, some checking springs and the little proform dohickey to check for proper length. First thing is that I think I wasted money on the proform tool. I put that on the stud and according to the instructions the stock pushrod is too short. However, with the checking spring installed and some marking compound on the stem it is clear that stock is too long. So I used my adjustable pushrods and with .150 shorter than stock the pattern appears to mimic this http://www.compcams.com/information/Products/Pushrods/ . I'm hoping I'm doing this right. Has anyone else had to get shorter pushrods by this amount? What could affect this? The best I can tell is that my installed height is 1.800. The heads are pro topline, the rockers are crane energizer and the cam is a lunati street master.