I had a feeling that's where that would be. My car doesn't have the panel (don't even know where to get one), or hoses going in or out, nor a canister. And if it did, I don't know exactly where I'd run that into the engine block on a 350sbc.
As mentioned earlier, I wonder what the other engine swappers have done about this. I do see there is a hardline that comes up behind the driver side next to where the fuel line is - it basically is bending pointing upwards (is that normal?) and I'm going to guess it's the line from the fuel filler cap area.