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