You can turn the sarb. Just remove the two screws that hold it to the back plate. Then swivel it toward the top of the engine being carefull not to pull it out from the head. Then you can turn the carb around and rotate it back into position. Once the screws are back in your done.
I would break it in with the 13x6. The book gives pretty good instructions on break in. My .82 would turn to much RPM even at the richest setting. So I did the first few tanks at 1/2 throttle with the needle all the way rich. I also adjusted the valves before the first run. Mine were way to loose. Go slow Vic and ask if you need more help.

David