More progress has been made!
With the transmission tunnel installed, I attached the upper suspension mounts:
I wish I'd taken more photos... but that's the rear suspension mocked up. Now, wheel wells begin:
I did the exhaust before I removed the transmission for working on the wheel wells, but this is a pic of it installed. It fits snug, but I can remove it all fairly easily.
Fuel cell Mount
I bought a summit fuel cell, 15 gallon with the little sump, and a gauge. To make the transmission removable, I need to be able to drop the cell out easily. Here's what I came up with, after a little Coffee and CAD:
Next, I'm going to finish mounting the fuel cell, then I'll build the straps to retain it.