I would go 4.10's. Either gear choice will be better than 2.73's. You usually can find 3.42 gears where people have removed them from other f-body's and/or s-series with the 7.5.
Did they do the billet corvette servos in the transmission?
Does it have green coolant or redish (dexcool). If it has dexcool remove as soon as possible.
Congrats on the daily
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