Hi can someone please tell me what a good compression should be for a chevy 250? Im not sure what the mileage is on the motor. We tested cylinders 5 and 6 yesterday. 5 gave us 120 and 6 was about 150. That was on the engine cold. I'm noticing a small antifreeze leak just under my torque converter and im not sure if it's a freeze plug or something else. But my temp is pretty high. I have a 180 thermostat but the gauge is reading about 210 to 220. Any thoughts?
