My 61 4x4 has an sm420 with a hydrolic clutch. Whats the difference between the hydrolic and the manual clutch besides having a little extra help? Also, how hard would it be to convert over to a manual set up that has a single master cylinder, instead of the dual set up now? The single m.c. would allow me to add a power brake booster to my system, the dual would be tricky. Any help with this would be greatly appreciated.

Matt