It's a little-bit of everything but this mostly. Basic bodywork & sheet metal fab is more than many even attempt (preferring to leave to those that do it for a living so it's done right). Going up the Totem Pole puts you w/those that try only to learn they maybe didn't do it well enough so there's things that still need attention. Complexity gives way to 'get-er done'. Your level is what I consider 'craftmanship' tier. You're making complex panels & leaving them exposed as part of the build.I'm sure a lot of people don't understand the gravity of what you're doing there. Auto body 101 floors suck to replace. 202 inside corners and fine detail are things blocks don't do well and any extended work time inside the car is brutal on the body of the person doing it. Then take in the fabrication factor and the fumes. My hats off to you and your labor of love. I can't imagine there's many people doing close to what you are to an 80 cutlass or any other car. I'm sure most would give up or majorly sacrificed quality of workmanship if they tried.
I can do sheet metal stuff & have done paint & body. I've done it enough to understand my limitations given my tools & work area. I'll do small stuff underhood or fab work on metal that isn't going to be a 100% visual aspect on a build. I'm struggling w/that as we speak trying to plan out the 'build-out' of my front wheel tub venture. I'll be watching for the updates.