I use to use a set up from Flex-lite called the "blackjack". It comes with all of the hardware and sensors. I had it in my 83 toy with a/c. When it worked, it worked great. It pulled plenty of air. The design is flawed a bit. They put the circuit board down in the middle of the main part of the heat being drawn from the radiator. It failed on me 4 times and finally got my money back. If they had relocated the board where it wouldn't over heat it would be great. I don't understand why they wont re-design it. I'd love to have an electric fan back again. I installed the mechanical fan back in for now. I did run across another build thread that the guy is using a 16" slimline puller. It has the sensor and board located anywhere you want. He got it from summit racing. I am still using r-12. It's a few degrees colder and more expensive but I think it's worth it.
