Using period correct components, be they NOS or 2nd hand, is what I would class as a resto. You could always improve your ride by using later model components, but a resto in my eyes is building something back to exactly how it left the factory. Possibly the term resto gets blurred because people dont do the proper research and take as gospel what they see in shows etc etc or maybe 2nd hand information which is incorrect.

A full nut and bolt resto is for the extremely dedicated....and i tip my hat to them. I use my cousin as an example.....his 1973 Regal Hardtop is very likely the best on oz. Was banned from the mopar shows as it kept winning year after year...so the judges politely asked him to step aside for fairness to the other owners, which he did. After getting the designers, production line workers and office staff from chrysler to look at his hardtop, there was only a handful of changes to be made.....wrong colour zinc plating on clamps, wrong factory markings.......all small things. Now its as it left the factory, but brand new. Now you cant find a fault with it. His air cleaner is signed by a bunch of chrysler execs and designers. Better part of 9yr build.

My point is, the research and attention to detail is far more than just getting NOS parts. Overspray, bad panel gaps, markings....all things that need to be taken into account. Not for the faint hearted.