My wife's dad gave her his old truck, a F250 super duty with a 5.4 Triton, 3.73 gears, a class IV receiver, and 200k miles. I put 40" tires on it, lifted it a foot or so, threw on some 5.13 gears (with a hella stout Yukon LSD in the rear) and a mild tune. The truck is used primarily for a tow vehicle; it pulls a 31' double decker pontoon on mostly flat terrain. It's doing its job ok now that I've got the 5.13 gears in, but still- pulling 11,000lbs. of boat and trailer with this big jacked up truck is pushing it.

I can't get a different truck, this one has centemental value. I absolutely can repower, and from what I'm being told, converting to a Cummins 5.9 24 valve common rail power plant with a different trans (something with a 4 in it, I can't recall the exact one) will give me enough power to pull the hell out of a boat and maybe even do some rock climbing.

What do y'all think?

 

The truck with the trailer.

 

Here's how tall it is. I'm 5'10".

 

As long as you have no emissions testing, and none on the horizen, a gas to diesel conversion will give you lots more torque.

Most of what you will find is Ford diesel to Cummins, not gas to diesel.

Check this out, it will answer some questions and prompt others:

https://www.dieselconversion.com/blo...e-Information/

 

If you want to sway in a diesel by all means go for it but if it is just low end power you are after I would put a screw supercharger on it. Not cheap but neither is a Cummins swap these days. Might want to go through the 5.4 before hand if you decide on forced induction.

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i would go for a 6.8 V10 if repowering, it will be a lot easier and cheaper too.