making wiring harness from scratch

inkjunkie,
great resource, they will hear from me.
I will be getting a sheet of 1/4" ply and laying out a full size firewall back on one side and firewall forward on the other. There will be a number of relay locations so there will be sub assemblies.
I will not be using used gear for this, right now what I lack is a source for a reasonably priced multi-pin bulkhead connector .
I will of course take pics.
I just picked up the two pieces of cable, one has 25/10ga conductors and the other has 50/14ga conductors.
I still have to draw up the complete schematic, but thats what the winter's for.
Andrew