[AnthonyG]

Thx for all the good suggestions, started working on a few already and the time to overheat at an idle went from 20 minutes to almost double that. I was running no stats and Terpu of ( Tim's Speed Shop ) on the H.A.M.B. suggested that the coolant was running through the circuit too fast without cooling enough and suggested restrictors to neck down the flow to 5/8 to 3/4 of an inch. Found a couple of bronze bearings the right size and it helped. I will be re-torquing head bolts tomorrow. Will report back.