Slant Six Exhaust Mannyfold

If you're in no hurry, I just picked up a 78 Volare to part out, it has a Super Six on it. Rumor has it, these exhaust exits were a little larger? I'd need confirmation from one of the gurus on this. I will be getting into this Volare shortly.

I'm not in a hurry. I am trying to get everything together for my 225 build for the Valiant. I could actually use two, so if you can confirm that one has the larger outlet, I am interested and at least I would know what to look for.