more info. went to napa today they have the pump. one is 4.25 in and one is 5.5 in (is that the long and short pump?) took the long way home and it stays at 195.at 45 mph so its getting good air flo. but when i stop and open the gate and drive in it has jumped to 210 + it feels hot when driving, there is no cover on the pking brk lever and my leg was warm.i measured my pump and from base to front of pulley it is 5.5 in and that was the cheaper pump. could i be lucky. i am leaning toward a new pump (rebuilt) when the cap is off and the thermo open there is waterflo. but looking at my other truck not a rush of water. what do you guys think?