The grommet I used to pull the oil and boost pressure wiring through the firewall (hereafter referred to as the "sensor grommet"):
Where I obtained the grommet:
Splitting the grommet to pull the sensor connectors through:
The grommet I bought for the heater hoses:
A good view of the heater plenum, sensor wiring, and the alternator/starter grommet:
In case you're wondering, the "alternator/starter grommet" hole used to be the dump tube for the A/C plenum, and is where Russ'll pull the alternator and starter wiring from the engine bay to the cabin. This is the same type of grommet used above for the sensor wiring.
I did some additional weight reduction on the heater plenum by removing the auxiliary ducts. I also fixed the hot/cold air door more securely than was done previously, and removed the hot/cold air linkage. I can post pictures of this if there's interest.
The progression of plenums and dash bar installation:
Good view of the finished sensor wiring & harness and heater hoses installed:
You can almost make out the alternator/starter grommet, below and right of the sensor grommet, near where the brake hardlines 90 over.
