I've been having trouble for months with overheating. Water pump, t-stat, cap, hoses and fan clutch are new. Last night I drove the car 60 miles and got on it ONE time through the gears and it overheated, and puked a bunch of coolant out. Compression is 155-170 psi, and I know the head gaskets were put on right when I put my thumper heads on. What could be causing this? I'm really fed up with this car! The car has been doing this for a while. What gives?