Time and the Virtue of Patience
Tearing the car completely apart took me a solid weekend, working with two buddies.
Further cataloging of parts took me a couple-three weeks working in my spare time. The body shop had the car about seven months. While the car was in for body and paint, I sourced parts, ran around to places like Vern's for bumper chrome, powder coating, cad plating, yadayada, had the headers coated, and did stuff on the car that the body shop refused to do, like sanding areas which never see the light of day, etc.
Once the car was out of the body shop, it then took about another six months- probably longer, to reassemble - and with considerable help from a number of friends.
Intermittent teething issues took maybe another year and a half, once the car was roadworthy. And then a year or two later, came the second motor- "my dream motor" which was another three or four months, and which presented a few more teething issues once it was in the car.
And it wasn't until a few years ago that I finally completed a number of minor items which were left on the "to do" list.
Two major items which remain are the hard top and a wide ratio box.
I've had the car for about 23 years and in some ways it looks better than when it came out of the body shop, minus the slight "patina" that black paint and shiny parts get over time of course.

Random orbital buffers, an array of polishes, and OCD, are my friends.
I would sum up by saying old cars, if you keep them, are rarely ever done.