DML FAQ : Engine : What would you recommend for an air cleaner setup on a GenII?
Get yourself an Edelbrock 14" air cleaner and a 3/4" spacer. Install a taller (I think it was about 3/4" taller) stud in the throttle body. You can now install a 3 1/2" tall 14" K&N filter element. The Edelbrock air cleaner kits come with a fitting for the stock vent line (though you'll probably have to shorten the hose a few inches). The end result is a re-usable open element air filter that is every bit as good, and a whole lot less expensive than the $100+ K&N Gen II kit (I think the K&N kit only uses a 3" tall element). I used the least expensive Edelbrock air cleaner (chromed steel- about $15) and had great results.