With canti brakes, you don't have to worry about fork swap issues. Should be no problem.

I don't have a good answer for how the changes in geometry will work out. You're shortening your wheelbase a bit, and raising your front end. I think decreasing rake, if all other variables are kept constant, actually makes a bike feel more solid and stable at speed. I'd welcome an educated analysis on this.

I recently broke a fork on my road bike, and I'm an uptight racer, and have been agonizing over whether a 3 mm difference in rake and a 2 mm difference in axle to crown has screwed everything up. I talked to my original frame manufacturer, the repair people at Calfee, and Enve, and they were all like "Eh, you can play around a bit . . . "

So, good luck.