On the fuel hoses I would just see about getting some new metal lines to run from the driver side (assuming you have the passenger side already there) and just use fuel rubber hoses for connections to non-flare connections. On the valve I would not trust a used one. Get a new from from the dealer or J.C. Whitney. I got mine for $80? from a wholesaler of AC delco parts. TO make it easier you should get a one wire hookup valve. Does your truck already have the switch on the dash? Of not let me know and I can help you on that as well. On the filler lines and vents try
http://www.lmctruck.com or
http://www.chevyduty.com both give free catalongs and Chevy Duty has some items online.