Hi there,
If I may, first, the sport seats will bolt in, and they will work, with a harness that I construct for this purpose.
Second, the memory function that may be in the donor seat will NOT work, in any way.
Third, the seat cushion is not thicker, as it is a higher density type of foam used for the AR9 seats, in ZO6 and coupe and vert, from the foam used in 00 and older.
Now, if you can or cannot, your choice, however, even finding donor seats, from a Corvette junk yard, it cost my customer 700 for the seat alone, that is with adjuster, and it takes me 10 hours to rewire the seat to correctly operate the controls.
Personally, I gained almost 22 lbs in the seat area, and that is not to include the other weight that would be added in the passenger seat.
Retro fit is expensive, and some would argue yes or no, however, consider this, if they had set this car up like ZR1, would it be as fast and agile??? My 2 cents here.
Best to all,c4c5