I agree not worth it for a 79 but the op is looking for validation not advice.... seems like he has it all figured outFor that money, might as Real Deal Steel and call it day.
14k for just metalwork on a late 2ndgen just doesn't seem worth it.
That is probably an over estimate to ensure they don't get hoodwinked on the money being paid and to work in anything they expect to run into..
Probably not what you want to hear, but aside from the estimate on floors, etc.. you said you're getting "complete door shells, so only installation and adjustment..." but I've spend as much as 20 hours per door, gapping, fitting, and bodyworking to make them look good and belnd into the other panels. Aftermarket or OE, you're going to have some time investment in replacing your doors, aftermarket is just going to cost more time. ( benefit is that they're lighter! =bonus!) That's not a statement on the quality of aftermarket panels, but certainly on the time it takes to make things fit well. I tell people to take what is estimated and add 20% to be safe. I read some great advice on this thread! Lots of folks have been down this road on here. Nothing wrong with investing in a vehicle build, just do it with your eyes open and expectations set at a realistic level. Good luck!!!