I was wondering if anyone has encountered the same problem I am having. I purchased a set of Crower 404s directly from Crower for my 91 RS. The bearings on the Crower camshafts are smaller than my stock camshafts. Stock measures 1.090 in, and the 404s measure 1.060 in. Crower says all of their cams are 1.060, and that I have an odd ball head. I have no idea of wherein the problems lies and no idea for a solution.