The engine is a 305 bored to 315. I had the stock radiator redone when I first built the car, but it started leaking so I bought a new Griffin and mounted that. I had always had a problem with heating when the truck was sitting in traffic as the way the motor is mounted I could only use a 12" fan which covered only the very bottom of the radiator. With the new radiator I cannot mount a mechanical fan as it touches the radiator so I bought a set of flex-a-lite electric fans and mounted infront of the radiator. As long as I am moving the temperature never goes over 180, but sitting in traffic it heats up quick. I have set up the fans to come on at 200 and they do bring the temperature down quickly but I have it set up for push not pull. I'm running this in a 37 chevy pickup. I have a high flow water pump. I just don"t like it heating up in traffic. Any suggestions. Bart