Thanks Mr. Pbody. I have run both 1.6 and 1.5 rockers on these heads and the push rod almost rubs with both of them. My heads are 60179. I am thinking the shaft mounts are out of location or machined out of location. The rockers I have used are crane golds for the 1.6 and stock adjustable rockers for the 1.5s. I am planning on having them looked at this winter before I start the next build with these heads and figuring out why.