Quote:
Originally Posted by Craig
I do, 3600 rpm is about 80 mph and the engine is very happy there. I tend to drive in the 3000 to 3500 range for hours at a time. I'm driving from WA to CO tomorrow (about 1100 miles), so that's about 14 hours at 80 mph. 
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You really ought to find a 2.88 diff for that vehicle.........or, if you're really bold.........a 2.47.........but, climbing hills is impossible in 4th gear.
You're well above the torque peak at 80 mph with the 3.07. The engine will thank you for it. You can do the swap in an afternoon.