Small block mileage

A GV-OD cost how much?
get a gear vendor no cutting , works really well have mine for 8 years now helps big with the MPG on the highway 70mph+ . I drive 100 miles a day in summer at $5.00 a gallon back then and $8.00 a gallon now it might not have paid for itself but sure helps and car drives nice with no rev induced headaches . What I really want is an 8 speed from a smellcat , still waiting . for that I'd cut the floor roof amything