Body panel assembly manual.. does it exist?

Just my 2 cents:

If you are working an area with lead and don’t want to warp it- full on flame is bad.
You don’t need as much heat as you may think to cut out the lead.
The old timers used a black flame on an Oxy act torch or heated a block of steel on a steel rod/handle (like the tool you see lead being added with) anyhow they heat the block end cherry and move the lead around with that and wire brush the loose lead off with that. Flame can be 1300 degrees where the steel is say 500 degree and it take a little more work but slows or stops warpage all together. If you don’t have a tool like that you can make one from a block of steel say 1”x 1” x 3” long grind a chisel like edge on the short end. Weld the other short end to a 3/8” diameter rod. Kinda like a arrow looking device. Once done, heat the whole block cherry red and being very careful run the lead till it’s loose and wire brush off the joint. Keep it moving and you will need to keep reheating the block. It’s messy but works. Good luck!
Syleng1