Super Victor - do I grind out bulge under carb pad?

They actually want to be straight across each pair of runners like that. You can grind to be a lIttle less radiused...but don't loose the majority of the radius.
Think of it like an upside down short turn!
If it were a wet manifold....I would rough the hell out of those areas , thin the divider walls a hair and rough them up as well. That's what I would do.