1972 EEC In-Cab Gas Tank Dilemma

[myoldchevytruck]

Below is a diagram of a 1972 EEC Gas Tank. Since the 72 tank is different than the 67-71 (NON EEC), I'm confused about the tank venting. Here's what I know.

There's a vent fitting on the passenger side of the tank

I have a stock charcoal canister and it has an in/out fitting

I have the vent loop tube that goes up to the Passenger Side Pillar (from another truck)

There's a Sending Unit with 2 lines and there's also one available with 1 line


Does anyone know the correct setup. Do I use the Sending Unit with 1 or 2 lines? What is the proper venting for my setup? Do any of these lines go to a vacuum for venting?


BTW, I have a 69' SBC 350/Automatic. Yes, I have a 72 In-Cab Tank. I did not relize it when I got it but thats okay. I have had it boiled clean and sealed.



Thanks in advance.