Dedicated Slabber clutch rebuild

[kanoak]

Aloha,
I am rebuilding the clutch on my dedicated slabber. I believe the unit is a DSM 23 19 but I am not sure; I found a tag that says S8-23 and it has a bar that is 87" tip to tail. I registered the unit with Lucas, but their website does not provide the model number of the mill. 
The unit was rode hard and put away wet when I bought it third hand, but she has already earned her keep. 
Baileys offers two options for clutch shoes with no further information on its website, and I have found no reference to either in the manual. The parts available are BDT6 3SH and DT-3SH.
Any help is much appreciated, but I am posting here for posterity and will update this thread when I figure out the solution.