i woudl calll autometer and ask HOW to do it.. you would need the gm sender unit and maybe somehow retro fit it to your tank? i to am interested in the answer... so if you find out post it..

what are your plans to fabricate this.. i considered it as well, BUT its a very expensive thing to do.. dont forget to include your check engine light in the new housing.. and where are you putting the old wiring to the cluster?