Hello. I'm new here and have recently bought an '04 LS8. I want to know where I can find a dealer who can hook me up w/ an XCAL2 or 3 w/ a tune for water/meth. I know I'll want to adjust but UDO usually only allow for small timing and fuel curve adjustments. I'd like a good base tune and would really like to have some support from the dealer to be able to email requests w/ logs and updates. Any help? I'm near Charlotte, NC.