'71 EEC Vent canister Replace or mod/delete?

[DjS71]

Alrighty, about to put the tank back in, want to get all of this handled at the same time.

So there are 3 hoses off the canister, 1 vacuum to the rear high port in the carb, 1 evap line to the lower front of the carb and 1 evap line that runs into the cab, and into the hoop-vent, which then runs into the tank.

So i can replace the canister (which comes out how? take out the inner fender?) and all the hoses for probably $150. OR I can plug stuff off (which and where?) and get a $10 vented gas cap.

Pros? Cons?

I've run the search and found some good info, just wanted to get some fresh opinions, and to not have my freshly coated tank balloon out again.