hi i have a el wagon that's on straight gas its a Impco one i wont to make it duel fuel i need help with the wiring as its been plugged into the main harness at where the petrol tank is meant to be who would be the best person to go to a auto elec or a gas fitter someone that's not got to reap me off or if i can do this myself thanks

Was it a straight gas car from FORD or has someone converted it. Does it have all it's tank, lines And injectors.Regards TPVM.