It isn't. That's the engine wiring harness going from the top of the firewall to a lower point on the firewall, where it passes through into the cabin near the ECU.
It's a VAF, not an MAF. The difference doesn't really matter, but it's virtually impossible to do forced induction with the VAF.
The transfer case lock switch from factory means no ABS, semi-floating rear axle, and drum rear brakes. Edit: also, no viscous coupler in the transfer case.
The transmission is the A442F (electronic version), which is a four-speed. The overdrive toggle switch is a button on the side of the...