For those of you that have done a conversion to dual circuits, I have couple of questions (I HAVE searched the posts) on my '54 3/4 ton with drums all the way around;

1)Can the new master go in the same location as the original, and does this mean that you cut a larger hole in the floor?
2)What else needs to be modified (i.e. brake lines or pedal modifications.

Any help is greatly appreciated.