viper or corvette??? Which do I buy

these are the 2 cars i am going to sell. the duster is a #'s matching 360 4 barrell, a/c, cruise, space saver, moonroof, electric defrosting rear window, 3.21 sure grip. nice fun car.
the belvedere is powered by a strong 440, 727, torker intake and carter afb.
has 3.23 sure grip. i have owned the duster for about 7 years and have only had the coronet for around a month or so. I just decided to try something alittle different. Don't worry though i do have several other a bodies so i am not getting out of them completely..

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