The tank is only 14 gallons. The tank mounted back does add weight where needed.
It handles extremely well. I was lucky enough to have Jeff Kendall help me. (Yeah that Jeff -- he owns a shop close by former (NASCAR) who loves these old trucks.) He did the dual exhaust setup and set the toe on this truck. He drove this truck and I mean scared me!!! I had just put the M-22 rockcrusher in. With me in the passenger seat, he moved that clutch like I had never seen before. I say again: scared the mule out of me.
While driving he said, "This truck drives good." I told him I got lucky getting everything right with what limited tools I have. I think then he saw the look in my eye and apologized for scaring me.
The truck can take it. That was about six months ago.
Recently with this good weather and the need to get out, I drove to get some food at the pizza place. Let's put it this way: I have a 2018 GMC 4WD 2500 Black I bought new with only 15,000 miles on it.