Thanks, guys! Flat towing isn't an issue, so EOC with the auto trans is fine. 46MPG is definitely attainable. I'm considering taking the scangauge out of DaGnoma and installing it in the SC. That by itself would probably get me there.
Now for mods... listed by cost, and therefore order of execution.
Air dam, since I have some leftover landscape edging lying around.
Next will be a grille and fog light block, since I have some foam left over from the cap on DaGnoma.
Warm air intake.
Smooth wheel covers, because pizza pans are cheap.
Rear skirts. Been planning this one for a while. With the shape of the rear quarters I think it'll look killer while picking up some mpg.
Belly pan.