Sweet ride! I stuffed one of these into my 72 Duster, stock hood and no scoop with a single plane W2 Indy intake milled 1":

http://www.jegs.com/i/Spectre/865/7318/10002/-1?parentProductId=1841264

I picked up 1-2mph in the 1/8 mi and it's at least 1/2" shorter than a 1" drop base with a 14x3" K&N with an x-treme top.

Looks great too!