help!!!!

Hey guys, i just bought a 1939 dodge and im lookin' to ratrod it. I got it sittin' on a 1996 dodge dakota frame and it looks like the frame is too wide for the cab of the truck...if you got any tips on lining things up or how to measure to make sure it will fit it would be much appricated.
Thanks

It sound slike you can either widen the cab or narrow the frame, but pictures would be very helpful.

ok thanks. i just took some pictures of it ill put them on the computer...ive been working on it for a couple of days now and im wondering if im in over my head here...haha ive been into them my whole life and finally got one. now i dont knoe were to begin.
thanks again
john