Intake casting numbers

Huh, figures one of the few things I'm lucky on doesn't necessarily help me, lol. The 340 intake on the 318 heads has got to be an interesting fit, I would dang near put money on it that there was zero machining done to make them match. Probably just looked on the shelf or the nearest junkyard small block for a 4 bbl intake and yanked it. I would doubt the carb is native to the manifold either since it's an electric choke. Can you put a Carter Competition AFB on a Thermoquad bore pattern without an adapter plate?