Anything that will help your car breath will pay big dividends. Aluminum heads will really help because they have a better heat coefficient than cast iron and allow for a slightly higher compression ratio. Good ported aluminum heads and a ported aftermarket intake would be a huge help. Also a good set of headers (jet-hot coated?) and look into a good throttle body/injector setup. I've heard of guys running in the 11's w/ a good blower/intake/head selection on the stock cam so I know that if you concentrate on the breathing of the car, 11's would be gravy.
