The shim for the front derailleur arrived today, so I was able to mount the front and rear derailleurs and thread the chain through them. Unfortunately, the front derailleur I have is a top pull and I need a bottom pull derailleur for this frame.
Luckily, this bike build is with the older 3×9 Shimano Deore XT M771 derailleurs so I can pick up a replacement at a considerable discount. After installing the Shimano Deore XT 771 rear derailleur, I am on hold again until the new front derailleur arrives.
In the meantime, I’ve moved on to running the derailleur’s housings and cables. While I can’t complete this, I’ve adjusted the rear derailleur limiting screws and I’ll be ready to complete the installation once the replacement arrives.