I made a power distribution block for a TBI. It's basically a two pole bus bar, fuse block and two relays. The two relays are Bosch style, 40 amp, relays. One is for the fuel pump and the other is for the ECM. The parts all came from ebay, and the breakdown is as follows:

Bus bar: $10.59
5 relays and harnesses (3 would be for spares): $11.64
Fuse block: $5:39

I wired and orientated the parts like this:

Attachment 7944


Attachment 7946

The wood base could be replaced with a piece of aluminum. The relays came with wire colors that don't match what is needed. The correct colors can be spliced in.
I hope this helps!