Reversible mods are generally not considered negative unless you are building a 100 point trailer queen. I also installed a brake booster for four wheel drums. Now that it's done, it probably wasn't at all necessary, pedal effort is very low.
Disc conversion is a little more invasive, but it's a safety upgrade and worth it if you plan to do more than weekend cruising.
Vikki 1969 Goldenrod Yellow / black 400 convertible numbers matching