New Truck
I've had 3 - 6.5 TD over the years and currently have the 94 which I bought and a 94 project truck that's in progress.The 94 that I bought new has every add on possible without going into the engine. There's only so much that can be done and don't expect miracles with the investments.
1- Put a mandrel bent turbo down pipe and get a boost gauge since your towing
and if your comfortable don't use the cat converter-you can buy extension to fill the space.
2-Look into a towing chip for the ecm, Bully dog system are suppose to be a Maxer also heath, SSDiesel and there are more but take caution with some - the cost are extreme.
3- Air Intake system. SSDiesel has a good solid product line.
There are a couple of other items but I think it is a good starting point-one thing at a time. Know your truck-the 6.5s have inherent problems with no starts which a IP driver extension mount will solve some of the heat issues.
The best
Michael
New truck for me its a bone stock 97 3500 4x4 6.5l diesel. I want a little more power this truck is strickly for pulling. just some ideas would be appreciated and what to look for in the truck and also it only gets to about 170 while driving is that normal?