[marvgarr68]

Originally Posted by 68post

The G20 van is sitting with a blown-up 6.5 na and a 4L60 that needs rebuilt. I'd be able to tow anything with my 4.10 gears and the 4L60, but it would be in od by 40 mph.

Approx. 2,200 rpm in od with my tire height @ 70 mph.
And you're right, it should average about 16 to 19 mpg !

70 is good for towing 65 is better. I don't like towing fast. You never know what idiot will pull in front and slam on the brakes. 16 to 19 mpg in a 4.10 truck is great.