What are the LD4B manifold worth?

The port window on a stock head is one of the biggest red herring in the mopar sb world! Total BS.

Put an LD4b and a LD340 on the same 350ish hp engine and you will hardly see a difference in performance. Having one and wanting to swap to the other is a waste of $.

Biggest issue with the 4b is lack of coil mounting bosses.