My car is a coupe from California with no rust issues at all. Unfortuately, you can forget my method in your case. If you have rockers that have been weakened, my method might cause your car to fold up.
You are definitely going to want to put supporting frames into the door openings. For both floors AND rocker replacement, I am sorry to say that I have seen the need for professional restoration places to construct a full steel body jig for convertibles to keep everything supported lined up.
Hopefully somebody else here has shared your issue and can chime in.
2012 Mustang Boss 302 #1918, Competition Orange. FGF replacement 2006 Mustang V6 Pony, Vista Blue. Factory ordered. 2019 BMW X3 (Titled to the wife, but I'm always driving it for her. So I'm claiming it) Old projects, gone but not forgotten: 1967 FB 400, original CA car. After 22 years of work, trashed by the guy who was supposed to paint it. I had to sell it. 1980 Turbo Trans Am 1970 Mustang fastback, 351C 4Bbl, auto 1988 Mustang GT, 5 speed 1983 F-150 4x4, built 302 1994 Chevy K2500 HD 4x4, 454 TBI
