I enjoyed reading the thread as well - just a good overall view of the emissions systems on these trucks. Other than a deleted air pump, mine is mostly original and I'm afraid to touch it....
I don't have anything to offer technically, but I too would question the reasoning if you stand to achieve little or no functional gain, but risk "destabilizing" the system to eliminate a few hoses? Or are you trying to solve another problem as well?
1976 FJ40 - green and mostly stock
1996 FZJ80 - not so stock