I have been running the truck on the 65 and 85 horse tunes for a while without having my gauges installed. Finally got the time this weekend to put them in and I see on the 65 tune egt's get up into the low 1300's on long hillclimbs in 5th&6th. They drop imediatley when I let off. How much is too much? The probe is located pretty much at the end of the passenger side manifold.