Ok. Haven't updated in a few days.

First-We found a grommet not doing anything in the firewall. Cut an x in it, and it pushed right thru by the driver's feet. Perfect.
Second-We ran it under the edge of the interior, can't see it anywhere.
Third-Today, we ran the high input on the L door speaker to the rear. Ran out of wire. 20 feet just for that! So I have to pick some more up now.

Yeah. Coming along pretty well. Tomorrow the signal wire goes in.