We have a 64 Daytona 4 door, 289, flightomatic, model 27 TT rear with a 3.07 ratio. It's a bit lethargic off the line (2nd gear start), and has a vibration which seems to emanate from the rear end (despite having replaced the bearings and having set the endplay a few times. I've been thinking about replacing the rear end with a model 44 TT with 3.73 ratio. Can anybody provide me with info to figure out revs at interstate speeds with this setup, and maybe what some of you techy guys would estimate gas mileage would be? We are running an Edelbrock 500 CFM, engine's bored 30 over. We're running about 16.5 to 18 mpg at interstate speeds now (and taching about 2500 to 2800. Also, one last question, would it be a good idea to change to non-tapered axles at this point, and where best to purchase? Any opinions would be greatly appreciated.
Kelly
Kelly
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