I read that thread and it seem to be working towards a mech unit for the head and change the guage. I am trying to find a compatable sending unit(3/8 npt) to match the guage. If I can be sure of the guage needs in ohms,I will work to find a sending unit that matches but also fits the smaller tap I have. If succesful it might help the fellow in the other thread as well as others. Thanks for your info.