don,t know why ?

well i swaped my 3 on the tree four a shifter less coulum cause i went 4 speed the coulum i had was to short so i swaped my shaft from the 3 speed over cause it was longer. well it still seems to short. where do i find the adp. to make it work i,ve read of one on here before? it,s a 71 with manual steering.