Best thing to do is make a cardboard template, and then trim it to fit. Once you are satisfied that you have done all the adjustments needed, transfer the cuts to the FRC itself. As the others stated, you will have to trim the Corvette FRCs so they will fit. More has to be taken off the passenger side than the drivers. It can be done, just go slow and be careful not to cut too much.
simple search pulls up this pic
