1998redcoupe

Talked to a guy out in California for a while about different options for stall speeds and what intentions I have and so forth. Anyways he asked me a question about the size of my input shaft on my tranny? He said it was either a 298mm or 300mm and he needed to know what it was. I have a 1998 corvette and I told him I was pretty sure it was the same as the 93-97 Lt1's because they are the same on Texas Speed's web page. Am I right? Don't the LS1 Camaro's and Vette's differ in converter size or bolt up patterns? I do have the 4l60E right? I just need to know this. I called Chevy, my engine place, a couple shops in Corvette Fever and no knows. They just order converters of the shelf. At least, the places I called. Can You guys help me out please. I would like to get this ordered so it is here for the engine install.
Thanks
Mike