"The trans is cooled by a cooler from Bow Tie Overdrives mounted in front of the radiator. The radiator is an aluminum unit from Speedway Motors and it keeps the trans temperature below 140* even on 100* days."
Oops, I had a senior moment in stating the above.
What I MEANT was the trans cooler keeps the trans fluid temperature below 140 and the Speedway radiator maintains an engine coolant temperature between the thermostat opening temperature of 180* and a maximum of about 195*, even on uphill pulls on hot days.
Thanks for that extra info dan-pa