i bought an 80mm MAF from a '94 mark viii for $60 from someone here (it has similar electronic transfer function as a stock SC MAF), and installed it (was already modded/bolted to stock air box. Feels like it picked up a large chunk of torque in the mids, and 20 horses on the top end. but that may have been because my SC was running very lean in the first place, and i'm using a 70mm TB with a custom 3" homemade intake tube (ghetto style pvc pipe/plumbing connectors). it's definitely worth a shot though- i'm very happy with this mod. keep your stock air box and cut a bigger hole in the air silencer (under the passenger side fender well)- it'll run better, i've tried that cone filter setup and it's no good when it's hot under the hood.
look into installing a 5% supercharger pulley, they are around $60 as well. if you are able to do all of this at a minimum, i think you'll like the feel of increased power- very nice and very noticeable.