[Motiv8]

Mr Massey 478. Been a long time since I've seen anybody that knew the correct procedure for removing a plug. That's the way I was taught 70 yrs ago. Been a pro mech and Special eng builder now for 65 yrs. Still building. I'll add one other step. Just loosening the plug will shed a thin layer of carbon. Loosen plug a turn or two, do the full blow away as you posted, tighten plugs , then go drive it. This will almost always blow out that bit of carbon. Very important prior to making a compression test. Most flathead engs of the past had plug recesses that collected grit. Add to that the older engs always had a carbon layer. That carbon could easily stick on a valve seat and your comp test would fool you. Combined w/ wide seats or weak springs, a bit more testing might be needed. Much confusion and unneeded repairs can be avoided following your post #34 and this "drive it " tip. Other things like throttle and choke plate screws not restaked can be found lodged in piston crowns. David