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Re: 2.73 Rear end for a 57' Chevy Truck??
It won't hurt a lick to drive it first and see how it does. And if it does what you want it to do. It's already under the truck, drive it for a couple thousand miles and see how you feel then and decide then.
It's your choice though. the possibility of a few more miles per gallon on road trips to truck events and easy freeway cruising or a bit more poke off the line once in a while and a few mpg less all around. At close to 4 bucks a gallon I'd want to know if I could be happy with the highway gears it has now. Don't let people talk you into something until you have tried what you have now.
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