just an update for anyone looking for this info:
williams dials do hook up easily into an RT
four connectors go into the back of the RT one, and the three largest of these go into the back of the williams one easy. These are for temperature, fuel, speedo and revs. also the indicators, battery and handbrake lights work from these
what doesnt work are the lights that indicate when you have your headlights on, foglights, high beam etc.. but its got dark now so i cant have a play around. i assume the little plug does this and i dont think theres a place for it to fit into the williams dials, but will see about where they might go to!
also, havent had a play with the oil guages, but i know these wont have senders, just gota find the blue plug so they light up, otherwise ill have to customise them to pretend to work
and another thing, they have the large orange perspex crap so making a non orange glow might not be possible, but i am experimenting with the guy who wrote the guide on ultraleds as to what we might eb able to do.. more news soon!