Hey, I can finally answer a question
Have front and rear coolant temp gauges on the V8. Front sensor at point where coolant leaves to return to engine, rear in cylinder head at last exhaust port where it returns to radiator.
Normal ops: front: 165 rear: 210
Hot (uphill Mulholland fast clip 100 ambient) : front: 235 rear: 190
Will overfill 1 quart puke tank when running hot, so will go to 1 gallon if it will fit.
Fuel tank will become warm to touch, but don't believe it's enough to cause a problem.