Trade '71 340 intake even for LD318 or street friendly 318 intake

Ya might be. A resto would require a certain numbered intake. IF the person restoring the car/engine wants it, a purchase of a intake you want to trade for what he wants isn't out of the question.
that'd be fine by me, but I really want a 318/360 4 bbl intake. any one that is streetable. I don't need a tunnel ram