sounds like you have put alot of thought into it, one thing i would recommend, if the car has been sitting for a while, after you start it and it warms up so the thermostat opens, check radiator level,
when i picked up my 280ZX that had been sittin for a while, i didnt check that, i just did oil + plugs + tune up + fuel then drove off
so 50km down the road i was overheatin, pulled over, topped it up and off i went, havent had a problem since.