68 C-10 Chevy LWB "Basket Case"

[All#sMatching71GMC]

Hello everyone, new to the forum, not to 67-72 Chevy's! Found the forum on a google search, while looking for some pointers on body to frame brackets...why is there a difference between bed to frame brackets on a gmc and a chevy? The middle brackets are bigger on a chevy, or is just on the variance of the years between frames?? Is anyone familiar with this?
I built a 70 C-10 5 years ago and have been kicking myself in the butt ever since I sold it! I recently stumbled across a deal on an 68 C-10, this thing is a totally basket case. (1st pic)
It was a Georgia truck, so it's pretty solid, especially the frame for a 68. Most of the rot spots are good body wise, the drip edges and windshield are great. The standard cowling areas need some attention, and some rot on the bottom (like the cab mount supports...but with original cab corners) Isn't that wierd!? I think I can deal with the cancer on the cab, if not I guess I'll have to shell out some dough.
I'm looking to build a solid work truck. I have a solid C-20 frame, from a 71 GMC, the 68 cab, some solid 68 thru 72 front clips, good doors, and all the stuff in between...Are there any known conflicts between chevy frames and gmc cabs? Theres something between beds, thats for sure! lol I have lots of extra parts, been saving them since the last build...I'll have leftovers! lol
I need to find another cab and shortbed, I have another longbed with one bad side, maybe a candidate for a conversion to short box? I have another C-10 frame 6-bolt drum all around with the trailing arm setup, no leafs...was wondering about doing a short box truck with this frame. It's super solid, and is the one from the 68...(Last picture)
I'm doing the work truck first, I need a better cab to start with for a short box truck, that will be the one I strive the most for perfection with!
The main thing for now is my 68 cab resto...(2nd and 3rd pics) I don't think there are any conflicts with a 69-72 front clip and a 68 cab are there? I'll have some more pics to post soon...
Thanks for looking, and any advice or input is always appreciated!
It's not going to be a show truck, it's going to be a go truck!