Do you mean that you want the peddles farther away from your feet? If this is the case and the peddle mounting plate is too far to the rear then you can unbolt the vertical portion, the part that has the mastercyl and clutch cyl mounted to it, and remount it farther forward. This is not a 10 min operation but it will not be necessary to cut any frame rails or reweld anything. You will have to get to the nuts that are inside the steering rack void so you will have to take some of the panneling apart.
This should work up to 6'3" or so.
As a bit of advice, If you get this all taken apart it would be a good time to shim up the steering rack 7/16". I believe this will improve the bump steer quite a bit. Just put a 7/16 alum. plate under the rack mount on each side to raise it up the 7/16".
Bud can you chime in on this?