I doubt you're going to find a pre-bent line for the Carter carb, since they were aftermarket. Shouldn't be too difficult to modify the line for the Rochester to fit the Carter. I would use the straight fitting on it and form a bend right near the end to hit that fitting. It would make it easier to fit the line on.
As far as that hole, there's a relief cut in the carb base so that it sees the venturi and shouldn't be blocked by the gasket.
