Actually, your 71 B body is a lot more like an E body than you might think. From the front floor pan forward, the 71-4 B's and E's share floor pans, front frames and suspension,even the inner front fenders are the same. Ma Mopar put a lot of $$ into the new e bodies, so one way of geeting some investment back was to utilize the e body front on the new b bodies.
Great looking Mopar, love the later B's, and thats a great color combo!