I have had every gear mentioned in this post. I am running 4.56's and I checked the mileage and it is 18.5 mpg. when I had 4.30's I got 21.5, 4.10's = 23 mpg, and 3.73's netted me 25 even. I run a N/A 97 cobra with 275 Nitto's. I think if you run 3.73 gears and a new Z-28 lines up next to you at a light you would be in trouble. 4.10 maybe not! 4.30 and you can beat him!!! Rpm with 4.30 at 65 mph was 2400 not that bad!!!
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97 cobra, 430-456 gears,mac-longtube headers,ect,ect,ect
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