Best 4bbl

No mention of a Thermoquad? The factory used them on mid to late 80s 318s I'm pretty sure. I've had a couple that worked awesome when the were tuned in. Mopar Action magazine had an article on them, within the past couple of months, telling you step by step how to set them up. They are a great carb & not too expensive.
Agree, TQs are great, but since the OP said he had already purchased an LD4B manifold to use, I limited my comments to square bore carbs.