well from my experience with mine its way under powered( its a carb model hah thats why). mine had an overheating problem forever i was gonna freak da fack out. changed the water pump, thermostat, flushed the block still overheated. well turns out i just needed to flush my radiator and that did the trick. when you go to fill it with water raise the idle to like 2-3 grand, jack up the drivers side of the car like 2 feet higher off the ground, let it run for like 15 minutes holding pressure on the hose everytime you add coolant so the air bubbles go buh bye. thats what id say it is. hell it might just be normal for it