This is something you need to decide what you want the most.If you want the 5-speed swap,then go for it.If you want more power,then go the blower route,but you gotta know/decide what you want the worst of the 2
As for the gears,you wont need the 4.10's if you go the blower route the most you'll need is 3.55's to 3.73's.