I was (re?)introduced to Chuck Haley recently and discovered he had a copy
of a Bell Labs memo from himself, London, Maranzaro, and Ritchie.  They
suggest that the path pursued to get UNIX running in/under TSS/370 was the
hard way to go.

Enjoy:
http://charles.the-haleys.org/papers/Alternate_Implementation_Proposal_for_Unix370.pdf


-- 
- Tom