I assume that SSK would be doing the rechamber, and if so I would suggest letting them put a T'SOB mount on it. If you don't want to put the money up for that, ask him to add two extra mounting holes to the barrel and get a stratton 6 hole base from midway. they're in the $35-$45 range, so it'll save you a bit over the T'SOB. Add some Leupold vertical split rings, and you're set.
Mkee