boy, does this sound familiar. after rebuilding a 455 for my 72 lemans, pretty much the same thing happened. had the radiator bioled and flow check, then installed a new desert cooler rad (4 core), a 160* t-stat, two different clutch fans, one new replacement clutch for the fan, two different afermarket flex fans, an electric pusher fan in front of the rad (made it run hotter), finally put in a factory 5 blade flex fan (non a/c style no clutch) from a 72 350 ventura with a spacer that put the blades half in half out of the shroud. bingo! 175-180* all day long in the summer heat. another idea would be the pulley diameter with the aftermarket pump. it might be spining it too fast or too slow, both arn't good. just some more ideas. hope you get it sorted out soon, so you can start enjoying it.
|