I was going to tell you you need adjustables with those shorter valves, but that looks like a very doable valve setup. Did the PRW's come with hardened shafts? The roller bearings eat up soft stock shafts. Only bad thing I have heard from that style roller is the roller tip bearing or bushing has reportedly come apart and littered the motor with hardened fragments, but that could be an isolated incident. Also, the beehive springs, are they the same diameter at the base than the double springs you took out? That is important that the springs seat nicely in the head, the doubles should have an extra step down there for the inner springs, didnt notice.
