Quote:
Originally Posted by marvgarr68
Thanks. Just swap in an overdrive trans. I'm sure the mpg increase would pay for that. You can put just about anything behind a na 6.2 even a 700r4.
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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 !