On the "progress" front
--- Managed to get some insulation in place then back to head scratching on the dash/firewall/doghouse thing.
Needed 1-1/2" to fill the four window deletes so I wound up using a triple layer of 1/2". Works out to R-9.6 according to the chart. And that is over several coats of the HyTech insulating paint.
The body panel next to the pilot's chair also has the HyTech paint treatment but with the "bubble-wrap" Mylar insulation. May have room to add another layer but have to wait on fitting the roll-up window to tell.
The dash/firewall will be fabbed out of 1/8th" steel as will be the floor pan, doghouse and a box that the pedals & steering will go in to. All that will be heavily insulated for heat & sound on the backside.
First pass at chopping down a '90 Chevy 2500 van brake pedal. Took about 5" off the top of the bracket and 1-1/2" out of the pedal arm. Still had to go back and shorten it all more. It came with the master cylinder & power booster I am using.
Handed off more sheetmetal templates to my local shop today. The whole firewall/doghouse set. Still need to work with them on how to arrange the seals but they are swamped with big money work right now. My piddley paying jobs go to the back of the line, but they do such good work, I don't mind waiting a bit. Just not toooo long.