Next time I'm going to pull the radiators. By then I'm sure the it'll be to re-seat the valves. Ugh, not sure I'll be up to pulling the heads. The gear drive did make it a lot easier. When I first started her up I had to kill it quick. Lots of clatter coming from the very cylinder. The rear exhaust cam was off by one tooth. I blame my assistant for distracting me. I do have a worry, after a few heat cycles would the the cam retainer bolts need torquing?