84 olds 9-8 with the tempamatic controls, has no heat blowing in cabin, every part new. water pump, heater core, hoses, pc vavle, radiator. only thing left is the blend door. anybody hve any pics and instructions on replacing it??? i was told to get a replacement door and controls from an 70's cadillac. heat is warm at the most then turns 2 cold when driving. we got snow this winter is this is starting to confuse me