I think you Should leave the cab the same and just add length to the bed. Maybe use the extended frame with the regular cab.
Yeah.... I noticed that the D-10's cab is too short (if I seat there, for example, I wouldn't fit). I recommend you to use the stock (OEM, if you want to call it, D-15 cab and extended frame) and just bridge the gap on the bed... If you know what I mean. EDIT: what I mean is, you should take a config like this and make the bed longer.
that's a nice idea.....but D10 is good and i dont want to change it anymore...yea it wouldnt fit u but ,it just a game lel but i will try what u said
That's Ok, I'm just suggesting ideas. The can also be a D20 or 30.... (if you don't want to do this then I'm fine with someone else doing that just credit me )