Yes, I converted my 50 over to front discs.
Added the dual master cylinder under the floor in place of the original.
you can purchase a kit from CPP
http://www.classicperform.com/ or from Ecklers Classic Chevy (where I purchased mine)
http://www.ecklerstrucks.comThe kit bolted right up to 1/2 spindles. I feel I can now stop at HWY speeds where as before I didnt want to drive in any traffic.
Yes it is very reversable.
Good luck