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So you do have a small amount of heat buildup. Still doesn't really explain your problem, but might be a factor. Here's something easy to look at that might be significant, especially since you're in Panama and probably don't use your heater - are the heater core coolant lines from the back of the head blocked off or are they looped back to the water pump, from the head? Or are they connected properly to the heater core? Looping the line back to the pump inlet (bypassing the heater core) can cause overheating, in a perfectly fine cooling system. And, still wondering about fuel pressure, and the return lines for your fuel supply system. Important.

Just drill a hole in your existing clutch fork.

Bad news and good news. The bad? Worked most of the weekend clearing shop space and dealing with power outages caused by the wind. (Jai (RedBird) has christened the 71 "Parti Girl".) Late Sunday afternoon we finally got the last piece of equipment moved. By then snow and freezing rain had set in. Probably won't get her into the shop until this coming Sunday. It's the only day my friend has off and he has the truck to move the trailer with "PG" on it . The good news. The same friend with the shop has a 120v plasma cutter. He has cut 1/8"+ sheet metal with it. I think it will work just fine. If all goes according to the new plan, I'll start undressing "PG" next week.

I doubt it too. I will change it out soon. Got a lot done today. Only snapped a quick picture. The grit is getting smaller as I recycle it. I will need a new bag soon. Too much fine grit and it's taking longer now.