Coilster, what temp thermostat do you have in there now? I had the same problem after doing mine and putting an alum 3 core rad and flowKooler pump on mine and I had a 160 stat and while it stayed around 180-190 in the summer heat, during the winter it didnt want to warm up, so I have to change my stat out to a 180 and try that. I am currently goingthrough a rebuild of the car, so that will have to wait until I get the car and engine all back together.