Not certain the older visions were the same? but my 08-09 visions take a Spicer 5-155x to replace the original "lubed for life" ones, when their life expired...
Both the above #'s are the same size u-joint (1550 series) would just depend on if you want to be able to grease it or not... SPL-70-X should be non grease-able(lubed for life version)...5-155X has a grease zerk