Proper Slip Yoke??

Trying to find a slip yoke for my A727 in the local U-pull yard.
Due to being on the road, not having access to look at my trans, not sure if this would be the proper spline count.
Just needing one to keep fluid in trans while running. Will measure for a Mark Williiams drive shaft when home. Trying to utilize all time at home in a productive manner, without chasing parts. Any input would be appreciated.

AT 005 (Small).jpg