When I was running without A/C, I had a 10" x 10" x 2" 6-pass tube & fin cooler mounted in front of the radiator. The highest I ever saw it was 125-130F measured in the pan. I have an automatic lock-up in OD, and if I'm running in any other gear, I can lock it up with a switch on the dash. On the road, it very seldom kicks the temp gauge over the the minimum reading on a 100-250 gauge. I often put the 700R4 in neutral at stop lights because of the cam - and because I currently have a pre-bankruptcy Street Demon which I've never been able to tune correctly. I've been concerned that the trans doesn't get up to a good operating temp. (The engine is a Chevy Fastburn 385 upgraded to the same cam and roller rockers as the ZZ-430.)