Wish my Valiant ran this cool!

I'd guess too little advance on the timing and a little too rich of a mixture. My slant ran REALLY cool until I bumped the timing and drove it on the hwy.. I will say that even now it will only get hot enough to use the heater after about 10 minutes of driving and that is in 50* weather... I had to throw a thermometer in the rad just as a sanity check to make sure the gauge wasn't hosed