That's really making me think. I'd say it would be close do you already have the shanks? The 3" ones are only $1 more and you would be safe provided you have the space
Thanks to everyone. This was exactly my fear, that all the pieces and parts would take up to much space on the shank. I'll have to check, but I think the place I was going to order from only has 2" or 4" shanks.