Jeff, 205's use gears only, no chain. If you just want gear reduction, could you use a truck 4 speed with a granny low to get started? The NP-540 5 speed has a granny low, plus a close ratio 4 speed on top, if you need close ratios?
Otherwise, use an NP-241, 271, etc, which has a planetary reduction in line w/ the rear output shaft, whatever you can find, and you could even remove the chain and front output gears, but don't remove the oil pump.
Ed Pruss
Longmont, CO
