another 360/408 over heating

Blind Squirrel said
When they say 195* that means they fully open at that temperature.

Sorry, but a 195 degree thermostat STARTS to open at 195. Same with 180, etc. The listed temp is when they start to open.

512Stroker said
I never had any luck with electric fans for a street application.
I run a Griffin 2 row one inch core radiator with factory 7 blade fan, factory shroud and stock water pump.
My crank pulley is much larger than the water pump pulley, overdriven for factory A/C car.
30 over 340, roller cam with 727 trans runs 180 w/o A/C, 195 with A/C on.
In the past when I ran electric fans I had to divorce the Transmission cooling from the radiator, taking the trans heat load out of the radiator.
Griffin radiators rock!
Good luckView attachment 1715326332

I have the exact same Griffin radiator in mine. I painted it black and it looks like a stock radiator. At first, I had a flat aluminum shroud with a big electric fan. No matter what I did, the car (375 HP 340) overheated. I eventually got rid of the flat aluminum shroud and went with a stock replacement shroud from Classic Industries, and I installed a fan like Slantsix64 mentioned above. I powder coated the fan semi gloss black first. Works fine now. This is just my opinion, but as long as you have the setup you have now, I think you will continue to have overheating problems.