hi Steeveedee - I hear what you are saying, thank you for then link.
He blew air from the line at the fuel tank vent and nothing went through until he disconnected it from the canister...... this "seemed" to pressurize the tank or that was my brother's thought process. But this was over a month ago with the Carter QJet.
I actually just tried to take it out but got stopped by needing to take the battery tray out, which has cooling lines mounts under it and a bolt blocked by the radiator. So it was a bigger job than I thought it would be. I was running out of sunlight and mosquitoes were eating me alive - so I couldn't think about trying a different removal method
I want to see what was causing the clog myself (I have the service, overhaul, and assembly original non-reprint manuals). But it surely is not causing a problem now as it is disconnected and there is a clear path from the EEC Tank connection to the engine bay for venting.
Edit: forgot about bad luck. when putting the negative back on, it seems to be stripped/won't tighten. Fun times!