I mounted the starter solenoid under the dash
I cut the bottom bracket off of an old battery tray and bolted the tray to the trunk floor. It has a hold down clamp, so now all I need is a sealed battery.
I got a mini Sun tach at a swap meet and mounted it to the steering column. I might try to build a rally-pac to hold the tach and the oil pressure gauge next.
I got a big ‘super coil’ at a swap meet and mounted it to the firewall. The coil is oil-filled and puts out 45,000v up to 6500RPM.