The foam board insulation panel installation is basically done at this point. I just finished cutting and installing foam panels along the sides of the car where the exhaust pipes will run and inside the transmission tunnel where I imagine it will get pretty hot also. I received a PM from one of you guys expressing concern about the flammability of the foam insulation. It doesn't burn like gasoline but it's not fire proof either. All the exposed foam insulation will be covered with aerospace, foil backed fiberglass insulation cloth for one more layer of protection against heat but also because the fiberglass is fire proof. Yes, fiberglass car bodies burn but that is because the glass fibers are only reinforcement for plastic resin which burns.
Fiberglass cloth is just spun and woven glass fibers. It's an open car and it will get a Halon fire system so fire shouldn't be any more of an issue than with most other cars.

Now I'm installing some (8) small aluminum panels (3003 "alloy" .037"-1mm thick ) here and there on the chassis to either hide the insulation or to block off remaining openings that could be sources of hot air into the passenger compartment. Some of the panels in the photo still have the protective paper on them others were cut from scrap that no longer had paper on it. These still need to be fitted, trimmed, filed, punched, etc before installing them. A couple of panels on the chassis had to be made in several pieces, with stepped lapping flanges, to allow installation in confined areas. The copper colored bullet shaped devices are Cleco temporary panel fasteners. They are very quickly installed and removed with special pliers and really aid in test fitting and assembly work.