Thanks for the replies guys. I run a plate style on my car and it usually stays in the 140-180 range, might get to 200 on a really hot day if I make it to the final. My wife car this past weekend pushed a little tranny fluid out for the 1st time was a hot humid weekend and she made it to the finals.). I have just a tube/fin style on her car and being a C4 (car is a 63 Falcon) it only holds about 1/2 the fluid of a 727. I ordered a plate sytle cooler that is the next size up from mine and going to put a gauge in it and see what temp it is running.