That's about what I see too. 75-80 cold, 30-35 hot idle. As soon as you hit the throttle it's back to 65+ real quick. I've run this thing so long I barely bother to watch it now, lol.

CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax