Tips When Buying First Build?

[Pyromedic]

Hey all - new to the boards here and have found some great info. I'm 32 years old and finally getting ready to take the plunge on a life-long dream I've had since I saw that bada** C10 in Dazed & Confused, which of course is buying one of my own! Since this is my first time doing anything like this, I was wondering if the board could help me out and give me some tips on things to pay close attention to when buying their first build that apply specifically to C10's or classics in general? Things to stay away from, specific questions to ask seller, etc. are all the things I'm trying to find out about.

Hoping to find something with a solid frame and straight body, then swapping the engine, tranny, and suspension as I go. It will mainly be for driving around town and once in awhile making the drive in to work or out for a long cruise. Thanks in advance!