Edelbrock LD340 WTH?!?!?

The original LD340 was supposed to be an aluminum (light weight) version of the stock steel manifold.
The part#s on the manifolds and the Hooker under chassis headers made them NHRA acceptable, and like many, I bought mine from my Mopar dealer to maintain warranty .
The LD 340, Hookers, and 3310 were the first thing the 1970 Mopar Hustle Catalog recommended changing for performance.