Engine guru's, I need some help. I did a head swap earlier in the year and borrowed a set of Comp Pro Magnum 1.6 roller rockers. I had been running Comp magnum roller tip 1.52 rockers with my old heads due to spring limitations. Both sets gave me the sewing machine valve train noise. Well the friend that loaned me the rockers needed them for a motor he was building so I took them off, and put the old magnums on the new heads. I got lots of valve train noise, checked lash 3 times. It's not a clatter like a miss adjusted valve, just really loud. Not accepting this I figured I would order some new rockers. I got scorpion 1.6 rollers that seemed to be one of the quieter brands from what I read. Nope! Just as loud and now I am pulling my hair out. I needed .050 longer pushrods when switching to the new heads, but have checked each time I have changed rockers and my pushrod length is right. So at this point, what do I try next. I was thinking of just letting it run for a while to see if it shuts up a bit. Anyone have any thoughts.