g'day guys chasing a tail shaft to suit 120y wagon with jatco auto,also need the larger brake pedal,
usual stuff closer to frankston the better
cheers anthony

Id say a Sunny auto tailshaft would be the go, as they use the same auto as a 200b, which is a Jatco 3N something or other. Finding one would be the problem. As for the larger pedal, try to swap in an auto Stanza or Sunny pedal. The Australian built 120Y's & Stanza's seem to use the same pedal box, with a different clutch pedal. In fact, I always put auto Sunny rake pedals in my Sunny's, makes it easier to get on the brake during static linelockers ( at the drags & hillclimbs, of course). Bit of a pain getting the new pedal in, but sometimes I just take the pedal box out. Just need to remove the steering column (4 bolts plus some wiring & a dust cover), then undo the brake booster & anything else you think is holding it in. Much easier to swap over pedals on a bench.

worst case is I get another yoke fitted to my tail shaft to covert it to jatco I have to hope there is enough length as going shorter wont be an issue.

The spline is the same as the L series manual or auto output spline, thats what you need. The series 1 B/Bird 4 speed is a Borg Warner transmission, so it wont work.