jimbug
1/2 ton status
You should look into one of the Flexalite standalone units from Summit.... they also have their own brand as well. I have one in my buggy and it works great.... the Summit one has a higher BTU and is a bit cheaper.... But they are really simple to install and you can delete all the Shiot on the firewall
. Where does it mount?
. Heck yeah
.

With a truck that long, you could certainly use all the horsepower you can find.... 
. I know a 500HP D-Max is sure fun but a 700HP one will get out of hand fast. I've been thinking this may be kinda light for that much HP
.