That looks pretty good, and not too much longer than stock too.
If that swingarm has the same amount of material on both sides of the pivot area, just make spacers and center it up.
Mount the wheel in the swingarm and center it up, then meaure for spacers to keep it centered.
Then figure out how to make your chainline correct, some guys will remove the studs and chuck the sprocket carrier in a lathe and turn it down to make things fit.
Others must make shims to fit behind their rear sprockets to make things fit.
Cycle-X has good quality offset front and rear sprockets that may help, but they're not as cheap as the regular units if it matters.
-Alan