Need some serious help... emission system !!!!

[Vic1970]

I have a 1970 GMC C1500 pickup... with a emmission system that I can't figure out. The canister has three lines coming out of it. The tank and PCV lines I can handle --- it is the one mark air cleaner I can't sort out. It is connected to a metal tube that appears to bolt to the bottom of the passenger side valve cover... and then it connects somewhere. It appears it once connected to the air horn of the air cleaner... I know everyone thinks I'm crazy... I tried to attached some photos but could not make it to happen.. so I will be happy to email you a copy if it will help understand what I'm talking about. I would like to figure out how this monster once went together.... I think I'm missing a hose and a component that fits into the whole on the bottom of the air cleaner.... \

Check every book I can find in four libraries and no luck... can anyone HELP me...

Thanks



Vic 1970