[redmodelt]

Without changing the whole rear end, the F2 came with only one ratio, 4:86. While I used mine for everyday, it was town speeds. I think most came with a 6, but does not matter if 6 or 8, past 40/45 that engine was starting to scream. Maybe you could add a overdrive, but it would have to fit an open drive line. As far as a two speed rear end, never heard of one, but who knows maybe there was one.