main issue is the speedo loom will be integrated into the engine or lighting loom, so prob best to leave his alone and make your own one up see. dash wiring is dead easy if its 90spec as it runs from clocks to dash and is completly seperate to any of the other looms.
I have mk2 and mk3 diagrams, these should be enough to get it sorted, im 90% sure the speedo sensor is wired in as per mk3
