3.27 or 3.55?
Which to go with? I have the stock 2.73s and I'd like a little more kick, but I'm still driving this car 60-70 miles a day, so gas mileage is a concern. I won't be drag racing (except when those imports try to pass me on the right), but as I make a few mods I plan to do some autocrossing. Is there a noticeable gas mileage or performance difference between the two? Thanks.
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91 GT - White, MAC cold air induction (that's it so far)
69 GT - Winter Blue, 351, C-4, mild mods
69 Mach I - Acapulco Blue, 351, T-10, bone stock
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