alum LD4B intake and big block adjustable rockers both ec

Moparraceman, thanks for the quick response. That is an awful nice looking manifold, at a reasonable price, but I think I'm going to have to pass. I need to do a little more research. I'm looking for an LD4B for my '75 318. I'm a big time rookie so bear with me, I don't want to buy the wrong part. You're going to have to educate me. Your D4B, from what I've read will technically work for me, but it was specifically made for early 273's (64 & 65). Is this correct?