Question about Engine Swaps on the M715

[joesco]

I purchased a M715 with a Hercules D3400, turbo and intercooled. The truck was awsome and incredible torque and got about 22mpg. Now I have moved up to what I call the kick a of all military trucks.

You will need to swap out the gearing in your truck if you re-power, no if, ands or butts...