I know this was converted before, but I wanted to convert it myself, so I did. I set the car up to function as a convertible, so it always spawns with either the convertible body or the coupe body. I gave the convertible body a functioning trunk (boot) by separating it from the mesh and making a small trunk compartment. I also replaced it's original wheels with the Manana's wheels because they more closely resemble the stock 63-67 Corvette wheels.

Extras
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extra_1: Convertible body
extra_3: Coupe body
extra_5: stock exhaust
extra_6: side pipe exhaust and air dam
extra_7: quad-tip exhaust and air dam