How far out is your slip yoke? Yeah, it should work for this situation, and you have to watch the fenders... you should be ok with 33s. Your slip yoke needs to be properly positioned... its only like $150 or so to have a shaft re-tubed
i have the opposite situation, will be moving back 1" for my slip yoke... (nose on a 14b is about 1" longer than 12b, so you need a slightly shorter shaft, or you move the axle)