Cheapest overdrive options? A833od? 200r4? T5?

Find a better daily driver. Even with an OD swap you would only go from craptastic mpg's to just crappy mpg's.
Yep.....for what it is going to cost go get a bomber.....but by the time you register/insure/maintain both vehicles the $$$ will probably be next to nothing....especially if NJ insurance is as bad as it was when I lived there....is that frigging JUA or whatever the hell it was called still around???