O K Dave, here they are. I have two of these boxes. they are "Project Box" from Radio Shack , They come in different sizes so You will have to measure your fuse panel and find the one that best suites you.
Left side
Right side
Inside left one.
If I were going to redo this I would drill separate holes alongside the fuse box on the left and run the individual wires through . Would look neater.
Inside the right one, all the relays for all the power eaters. these were just riveted to the side walls with wide aluminum pop rivets.they are forgiving and don't warp the plastic.
Back of right one. Need to connect the relays with terminal strips. Keeps it all in one place. Labels are from McMaster Carr I believe and held with clear shrink wrap.
The boxes were countersunk into the panels and are a friction fit. The boxes are tough and thick. If you look closely my car has vertical pieces in the engine bay that run from the rear window, down to the sill. When paneled, gave me some space to run the wires.
I also have electronic ignition and needed a place for them. They were just wide enough to fit on cushioned mounts along the outside of the boxes.This pic for some reason had the cover off the fuse box. There is a matching one on the right side as well. It was all based on being symmetrical. I added the frame around them to cover the rough edges of the cut outs.