So I just recently bought an 04 gmc reg cab dually from my work I got a great deal on it (almost free) but, it has a blown Head gasket. Other then that the truck is in great condition and only has 145k miles on it. I wanted to put a dually bed on it but after some research I found out its not very easy. What do you guys think its worth? I was having a hard time appraising it because of the HG. I was also thinking about fixing it myself and then selling it. Would repairing it make that much of a difference?