over heating prob????
You most likely have air in the sysytem. This will allow the heads & top of pistons 1 & 3 get hot & heat everything else up. It can also melt the top of the pistons (cylinders). With the cooling system cool, remove the radiator cap. Start the car w/ heater on high. Add water or coolant & re-install radiator cap. Drive for 10 minutes or so & let the car cool down. Remove cap & continue the process until when the cap is opened, coolant is full to top of radiator. Also, make sure overflow tank has a little fluid.
Best thing to do is connect the head vents @ the rear of the heads. Easiest method is to remove the plugs, install 1/8" NPT hose connectors & run a hose from the driver's side head to the passenger side head. Could also buy a bridge similar to what is used to connect the front of the heads.

