Hey guys, I have a 1995 Reg Cab, long box, with a 4.3 V6 as my winter rat. Well I got it for a 150 bucks three yrs ago. i have put tires on it thats it!! 184k on it. Anyways Its never had really good heat and I have been trying to fix it. I have replaced the thermo-stat, Heater core, blower motor resitor, It has great heat just sitting in the driveway at idle. Once I start driving it and get over 50mph all i get coming threw is the cold outside air?? Any ideas? Truck also runs like 185ish for temp?