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I used to skip shift my 6 speed and start in 2nd until I was told that was bad overall for mileage and wear and tear. This is on a Cummins diesel with 600 ft-lbs of torque on tap. If anything would work well with a 2 speed powerglide this would. I went with a tad taller tire 33" vs 31.5" stock) to drop freeway rpm. Now I run about 2000 rpm at 70mph and that seems to keep exhaust temps pretty low. It does get better mpg at 60 but the EGTs go through the roof towing with any throttle under 2000 rpm. So any acceleration or hill I always downshift and just use 6th for steady crusing. The NV5600 starts with a 5.63 in first and ends at 0.73 in 6th but it is a beast. Probably heavier than most 4 cylinder engines at 360 pounds.
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