You'll be pushing into the 15.5-16.x% range at that point...
I need to see how high 71B can go for ABV tolerance. I know it's listed as 14%, so I'll see if it will end right in that range, or if it could go higher. That will determine how I prime my batch...
BTW, You might want to figure your priming about for the batch size (3 gallons, not 5, right)... So you won't need as much sugar to prime as high.