I'm looking to replace all my fuel lines in the near future. I'm not sure as to the sizes from the tank to the pump and the pump to the carb. I've read that it's 5/16 to the pump and 1/4 from the pump to the carb. Can anyone confirm this? Thanks
You didn't specify a year, but all small 55.2-60 GMC trucks use these per the 1960 GMC Master Parts Book with no reference to a specific engine. Further inspection of the MPB shows that the fitting on the carb is for 5/16" tubing, so tank to pump would be 1/4" and pump to carb would be 5/16".
Last edited by Bill Hanlon; 10/07/20223:24 AM.
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12 '52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.
You didn't specify a year, but all small 55.2-60 GMC trucks use these per the 1960 GMC Master Parts Book with no reference to a specific engine. Further inspection of the MPB shows that the fitting on the carb is for 5/16" tubing, so tank to pump would be 1/4" and pump to carb would be 5/16".
That may be a typo. the suction (feed) line to the pump is usually bigger than the discharge (pressure) line. 1st rule of hydraulics: avoid intake restrictions.
