Completed riveting the firewall stiffeners to the firewall. This is much harder than it would seem as you can back rivet a lot of these parts but with the firewall bends and seams and bump outs it is tough to get a back rivet plate to sit flat. Lots of rivets in these parts then the holes for the engine mounts get reamed to .375. The tunnel sides are riveted to the firewall along with the mount brackets for the nose gear.
