Should i buy this truck? 72 K10 SWB

[yfs200p]

One of my neighbors has for sale his 72 K10, and ive wanted one of these trucks since i was 13 (now 22). I didnt talk too much to him about it and from the quick 5 minutes i looked at it, i know it needs alot. But i barely ever see any 67-72s around my area, let alone a SWB K10. It probably needs a new cab, the front supports are gone, as well as the rockers and part of the drivers side floor. I figure putting a new cab would be easiest for me since i have zero body work experience. The bed is decent, metal floor with some rot, but i like the looks of the Mar-K wood kits so i would most likely do that. Its a 350 with a 4 speed It ran and drove when parked maybe 2 years ago. Looking at the SPID, it appears that the body on there is from a 2wd truck, so the fact that it might be original is shot already. He is asking $1000, i figure i can probably get it for $700. What do you guys think, am I wasting my time? I'd like to do a frame up on it. Well here are the pics, sorry they suck but the truck is in a weird spot so its hard to take pics.