Okay, I stumbled onto this on accident on another forum... but, it appears there is a positraction unit that would work with 1st Gen Toro's... I figured I had to bring it here, and show xGecko, since he's going for the best tech he can squeeze into the car
They also have gears available--3.55, 3.70 and 4.10 as I remember. I've got my eyes on at least some gears but I'm wondering if the posi might be too jerky for everyday use in a Toronado.