Re: Gas mileage with handling option
Depends. What kind of driving do you do? If it's primarily city driving, then a lower rear end will greatly improve your fuel economy. If you do more highway, then a rear end with less reduction will be a better choice.
That said, the fuel mileage will be fairly decent regardless. My dad has a '96 Crown Victoria (basically the same running gear) with 3.27s and it gets 24 mpg highway with the AC blasting. I'm not sure what rear axle ratio the HPPs use, but it's probably either a 3.27 or 3.55 (3.55 is more likely). Bottom line, if you're concerned about highway fuel economy, don't be. You should be able to get mid-20s at least. If you're concerned about city fuel economy, you'll be better off with the lower geared rear end anyway.
1989 Ford Crown Victoria Police Interceptor
2bbl Carbureted 351W V8, ported and polished E7TE heads, Edelbrock cam
AOD Transmission with B&M Shift Kit
3.55:1 Positraction Rear Axle
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