Agree with the above and I'll add my thoughts. Some of the answer depends on whether you want to mimic the OE style details and components. It can be harder to duplicate another's lug shoreline curves or cut outs then merely using an off the shelf lug. When you take frames apart you learn how they were built, for better or worse. Like finding pins in sockets. Or tubes that didn't touch at the miters. So sometimes your project takes on a greater set of decisions and involvements.

I don't do many repairs but over the years have done a bunch. I always learn something. Often it's to not do that type of job again (but one's memory fades and you do). I usually use mechanical methods to pull and prep joints as I don't like having any more heat cycles then needed. Takes a tad longer but I feel better. Andy.