Hi.
First post.
I have a 1992. With 92,000 miles, 6.5 turbo diesle. CK 3500 4X4.
manual transmission with granny, and OD. All stock.
I might tow, 5000 pounds, mostly a daily commuter.

Looking to set up for max fuel economy. If it is possible to gain any thing with air intakes, pipes, .larger tires.

Is this year engine, able to run completely mechanicaly., No Computer.?