I picked "Old School" because my current car is mechanically the way I wanted one when I was high school (well TH400 instead of a Muncie).
I also think Old School because it has a carb, 15 inch wheels, big block Chevy with 12.5 compression, 4.10 gears, no overdrive, no air conditioning...it's a basic hot rod.
To me a restomod would include overdrives (not all G-body cars had 200-4R as an option). Sanden style after market A/C, fuel injection, LS swap, turbo, pro charger, huge wheels, huge brakes....swoopy ergonomic interior, fast power windows....
Nothing wrong with any of it, the a/c and overdrives will make these cars live longer and be more enjoyable.