A good-looking 9372S just popped up on Craigslist for $50.

What would I need to do to make this work on my car? I don't know what the weird box on the side is for. Supposedly it has hookups for an O2 sensor as well as a bowl vent valve.
http://images.craigslist.org/5Q25Eb5J23Fb3J93Hdc78e780f50c55c816a9.jpg


1967 Dodge Coronet Deluxe station wagon

1.03" T-bars, QA1 arms/rods, Cordoba/GM Metric/Volare brake & knuckle, XHDs, Hellwig rear sway, 318 Magnum w/ air gap, 727, 3.23s