Good Morning guy's I live in Austin Tex (just in case you need to know) and I own a 71 sweptline 1/2 ton with 318 2 barrel I have had the engine completely rebuilt, new water pump, Radiator w/shroud, fan clutch, thermostat, belts etc... and it still runs hot if I am in slow moving traffic, if I put the truck in neutral and slightly rev the engine it cools down, I am wondering if anyone knows where I can purchase a "ULTRA THIN" electric fan weather locally or online to install to help with my engine cooling issues, I really need help with this issue and I am so thankful for this site weather I get help or not, Thanks.