J Berger--these fittings are for upgraded lines, 5 total per truck if you keep the stock filter and stock lift pump. You could, but I don't know why one would, connect into the steel line on the frame where it turns into the quick disconnect line to the pump and just run -8 upgraded lines from there. It would be better to run a 1/2" pickup in the tank and run -8 all the way. I think the 2001. 5 and maybe the 2001 trucks have a 7/16" pickup tube, but previous years had the 3/8" pickup tube and I would recommend changeing out the 3/8" pickup to the 1/2". We may put kits together if the demand is there--pickup tube assembly, prefilter, pump and lines... or any combination... ... . chris