I have an 88 5.7L 260 hp alpha one gen one<br />over the winter i put in a new outdrive,new bellows new thermostate and a used thermostate houseing. took it out for the first time ran at 4300 rpm 42mph @ wot and 200+ on the temp gauge slowed down to 1200rpm temp came down to 160.<br />sitting in the slip it creeps to overheat at 650 idle but if i up the rpms to 1000-1200 it holdes 160 i took out the manifold drain cocks and riser bleed screws and water is pumping out of all four. i was told to take the used thermostate houseing back off and stretch the springs behind the balls that they sometimes lose tention ... also should i pull the drain cocks on the block to see if there getting water
