Oldgearz non ethanol fuel helps, also maybe keeping the fuel tank fuller, to keep the fuel in the lines cooler. A phenolic spacer under the carb may also help keep the fuel in the carb cooler.
I need to rebuild the rockers assemblies on my 292. I have a new pair of shafts, but I need to know how much clearance is okay on the old rocker to the new shafts. Thanks