Was at the WPC swap meet yesterday. Saw a guy with an Edelbrock LD4B intake manifold in a box under his table. I asked him if it was for sale. He replied with a "no". Told me it was an extremely rare LD4B that was specific to the W2 heads. I replied with a "huh?". As far as I know the Edelbrock LD4B was/is a dual plane manifold specific to the small port 318 heads. Anyone know anything about the W2 head claim?