T.P., (Hey - I didn't pick the name!
)
The long tailshaft will work, although I would check the location of the shift linkage (also shown in the manual, I hope) just in case it's different from the recommended position. The 289 mounts the linkage at the front position.
We also don't
stock the shorter driveshaft, but since we place orders every 6 weeks or so, we just need a warning from you about your "special needs" if you want to get it from us. If not, I can send you a blueprint if the specs for the long-tailshaft box aren't in the manual.