is this drive shaft for borg warner rebuildable

is the yolk for an 82 5 spd borg warner transmission rebuildable? i notice a clanking sound on my 72 240z car. i find out it is coming from a bad universal joint on the transmission end of the drive shaft. i pressed the u-joint out. the yoke does not look rebuildable. the u-joint housing does not have grove for the lock for the u-joint to stay in place. am i not just seeing it? if it is not rebuildable, what other input shaft is compatible with the borg warner transmission? thanks!!