I would try to use the charcoal canister system if possible. If you don't, you get a very strong gas smell around the vehicle. For it to work correctly, it should be mounted as low as possible like the factory had it. Gas fumes are heavier than air, and will naturally drift down the downward sloping lines to the canister.
I just did a lobotomy on my 1984, pulling the computer system off of it. I had a terrible gas smell after I would park it. What I did was hook the purge as a continuose purge through one of the very small plastic vacuum lines to the small port on top of the PCV valve. It works, but not as good as I would like. You have to be careful, the factory only purged the canister under certain conditions. Since I am purging all the time, I had to restrict the purging down a lot, and I don't think it's enough. I am going to have to do more research on how the older carbed systems worked and see if I can duplicate one of them. On the old system my BII had and the fuel injection systems, the computer decides when to purge and opens a solenoid.