If you want something production, the Corvette (C5) accessory drive is the shortest.
If you have an actual LS1 (many people use that term incorrectly and I don't know how you are applying it), then that is the drive it would have had.
As far as aftermarket accessory drives, I have only used the
Holley ones, but they are very nice quality.
My preference is for factory parts where I can get them though, so my recommendation would be to look for the original Corvette parts.
