Depending on what year the 416 is,, if its newer and has the normal axle type set-up,, or the older(most are this way) floater style,, same sized inner and outter bearing.. the older style haven't seen any hubs that will fit.. but the newer style can be done at any good trailer supply,, those have a smaller outter bearing,, the hubs can be swapped out..
Which do you have?