You're going around the world to cross the street. Refurbish the system and move on. It isn't that difficult once you decide that you want it fixed. The car becomes trouble free once you take care of the neglect. Do the entire system the 1st time and be done.

Sometimes you'll find an alternate part that works. I saw some 1\8" air brake line in 100' rolls that may replace the brittle vac lines. It will also plumb a pressure gauge useful for adjusting the trans and installing a boost gauge. It may be enough to do both SDs, the Cummins fuel pressure gauge, boost gauge and the Datsun Z boost gauge. Other sizes are available also!!!!

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85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do.