The book for my 98 says 24 ft. lbs. I would think it to be the same for you.
__________________ 98 Z28...799 Heads, LS6 Intake, 5308 Cam, Linginfelter Oil Pump, LS7 Lifters, LS2 Timing Chain, SLP Lid and Red FRC's. this is my Z06. RevMax 2800 Stall, Hyperflex Suspension Bushings and Motor Mounts, Drilled and Slotted Rotors.
It's the line that runs from the condenser to the evaporator and it's leaking where it seals up to the evaporator. I've tried both the regular green o-rings and the metal/black rubber o-rings. No matter how much I torque them down they continue to leak and I don't want to go past "gutentight." So I'm guessing either the flange surfaces of the evaporator or the line are messed up, and the line is the easiest to replace, so that'll be the next thing that gets replaced.