1978 GMC Sierra Classic: asking for input

[ripper6]

Hey Chevy Owners: I have owned a 1968 C-10 stepside for over 30 years, so long time owner here, but new to the forums and would like to hear some ideas from the community. Decided to add a square body to my collection and found this original 1978 GMC, excellent condition, original SB350 with 350 turbo trans, all stock truck, with about 77500 miles and I am the 3rd owner. Truck is all stock, period correct, no mods, with owners manual and proper docs to match. Since I am doing a major restoration on my 1968, I now have the GMC for another daily driver. So, I had originally wanted a square body to do the drop and LS conversion for a 2nd project once I finish my other truck.

Now I really wonder if I should keep this GMC all original and not modify? Any thoughts? Thanks for looking