Im not sure how its going to look on the inside of the bed if the inside dual will be inside the bed or not. but as far as the fenders go i was thinking of just extending them out a little.

sheetmetal and a welder and a lot of work go a long way haha

I like the length on this one its not short but it's not long either with only 60 inches from the back of the cab to the center of the rear wheels

thanks to everyone who responds and gives ideas.