Ahhh, gotcha. I was thinking along the lines of having the fuel pump circuit on there, nab power for the FI unit there too and maybe some extra taps for nitrous, stereo, whatever. Strictly speaking, more of an elaborate bus than a sub-panel I guess.

I've done the electrical hookup work on a couple of Fi-Tech/in tank pump conversions and I pondered such a thing. Get an adequate power wire to it and a good ground, and you have a nice tidy power center in the back of the car and isolated from the factory electrical system. You'd have to go back to the front with power for the FI unit, and maybe run switched power signal back there as well. I'd love to have a convenient bus in the trunk.