Mike,
If you plan on replacing the whole outer pillar panel, the assembly manual shows where the leaded joints are. I replaced the passenger side on my truck and also had to remove the drip rail as well. If you don’t have a copy of the assembly manual, let me know and I can send a pic of the page.

Dave


1966 Chevrolet Caprice 2 Door Hardtop (396 Big Block)
1951 GMC 9434 5 Window (waiting on a 292 transplant)