Yay finally feel like I got 'some' progress made. Now I will admit I completely forgot about the airbox... Yet it still all fits right in there. Thanks to work for the powdercoating and press-brake. Still need to add a brace to the backside but first I'll need to get a new booster and MC to see exactly where things fall. Going to mount a buss bar on the inner fender to power the relays and fuses from the battery.
The shorter booster and MC stick out roughly 12 inches from the firewall. Everything will be snug but should fit without being stupidly crammed in there.