Jabo the above suggestions work great if you have converted to an open system but if you still have the football on the passenger side firewall then you have the closed system and the best method is to park it with the rear higher than the front. Use ramps if you don't have a hill. remove the temp sensor on the rear of the head on the drivers side and fill the system slowly. That sensor hole is now the high spot and the air will eventually start flowing from it. you now have a system that is full and you can re-install the sensor and hook the wire back up.