So far, after listening to what you want to do with it,
I think you should leave it stock or just swap the rear axle for one with slightly faster gears.
The whole corvette thing has me worried, and I see no point.
Leaving the 235 means you don't expect it to do much, speed or work, so just leave it as is and drive it.
If you really don't plan to haul anything then faster gears in the rear would make it more drivable, but you can't go too extreme, as you only have a 235....
Grigg