Can you get your arm into the tank and remove the fuel return fitting? If so maybe replace it with a -6 m-m bulkhead fitting then after getting it into the tank use a -6 to 3/8 line adapter and install a length of 3/8 steel line to 1/2 off the bottom of the tank.

Hard to judge from the pix, it appears that if you mounted the fuel pump under the frame rail behind the rear axle it should be low enough. If its within say 3 inches of the tank bottom you should be ok.

Last edited by efi-diy; 02/15/09 12:09 AM.
51 GMC 4.2 turbo
Can't solved today's problems using the same technology/thinking that created them