Look for GM Chassis and Restoration Reconditioning black. That is the 100% correct paint. It's very expensive and hard to find, but you can usually get it at corvette restoration sites.
2004 GTO M6
Torrid Red/red interior
Mods: TVS 2300/H/C etc.
638 rwhp, 605 rwtq : blown engine, rebuilding soon
1967 GTO 400 H.O. w/ turbo 400
Cameo Ivory w/ champagne gold interior: ongoing frame off resto