273 4 barrel manifold questions

Ya it was confusing. The pictured intake with a Mopar part number was a 340 intake produced by Edelbrock and sold through Mopar parts. The D4B,LD4B, and the LD340 were also produced by Edelbrock but sold by them to the afermarket and not through Mopar Parts.

I google-imaged "LD4B" intakes and they all had the same Chrysler part number as the subject of this thread. Some of the pics are even from FABO here.