I guess Iam very lucky, my 440 on a warm day will get up to 190 or so if the car is sitting in traffic for awhile but as soon as the car starts moving it cools back down to 175. One thing I have in both of my cars is a Ron Davis radiator.

My combo
.030 over 440
11to1 compression
indy SR heads
.248-.254 solid roller cam
FBO dist
8 inch convertor
3.55 gear
3750 lbs with me in it.
Pro systems carb