Congrats Ryder,
I have the Harrison Daytona Coupe ( same chassis etc ) I went for the 6 speed Tremec with the standard 3.9 diff, it was a bit busy on the street
so I changed the diff to 4.54 and its much better.
If I had my time over I would have optioned for the 5 speed as I never use the 6th gear ( unless I am transferred to Germany )
Good Luck
STIFFY