At age 60, for the first time in my life, I tore apart an engine, my 235. Like you I had concerns about my abilities,but using a shop manual as a decent guide along with gleaning valuable info such as you're getting in Stovebolt made the process enjoyable.Yes,I farmed out the machining, but you can't imagine my excitement and satisfaction I got when the motor cranked over and fired up for the first time after I reassembled it. You should do it.
