2nd is the LD340. It is modified for a T-Q and the center divider is milled as per the Mopar book for high lift cams. It also has been port matched. It is a real screamer of an intake. You can not do a T-Q mod of the carb pad on the LD4B like the LD340.
cause with gas at $3 a gallon a mildly modified 318 will be plenty fun to drive and way more economical than a 340 .