Coil, pickup, cap, rotor, but I draw the line at a spare box (wired or unwired).
Damn, I hope I don't come to regret that comment!
So, here is the setup:
Bag on the left contains 12v compressor, hose, flashlight, and tire plug kit. The Shelby toolkit (kind of cheap tools) also holds the spare coil, pickup, cap, and rotor. Just to the right is a spare Holley fuel pump. The tool bags are sitting on top of the 158 piece mechanics tool kit from Lowes as recommended in the other thread. Not bad for $39.95. Now, I just need to find a way to strap it all down.