That cast iron intake is a very good intake, came on a '70 340. Don't waste your time with the offy dual-port. An Edelbrock LD4B is the 318 version of an LD340 intake, try to find one of those. Also good small block intakes are the Performer RPM, Torker II and the Holley Strip Dominator. DO NOT use a Torker 340, it will kill your power.

I love the smell of Deer guts in the morning, it smells like... VICTORY!