Any Ideas?

[gripnrip]

I'm hoping for some help and ideas for this build. Here's what I've got, a 67 chev shorty stepside that I would like to update with disc brakes, power steering with tilt, between the bed rails gas tank, and automatic with overdrive. So here's the options. I can pick up several different vehicles in the neighborhood for under $500 apiece, I just need to decide which one would be the best for my application. One is an 89 suburban 4x4 1/2 ton 6 lug with automatic and tilt, 2 is a 78 chev 1/2 ton shorty standard tranny, 3 is a 90 chevy van with a 350 automatic, 4 is a75 chevy 1/2 ton 4x4. So with these options what ideas do are out there. By the way I want to put the stock 230 or a 292 from one of my other trucks in this builder so the engines in the options listed above isn't too important. My biggest question is how hard is it to adapt my 67 body to a 73-79 style frame and running gear? Thanks for any help and ideas. I'll try and attach a few pics of the project.