I would crank down the LSD acceleration settings to around 20 and lower the initial to 1 in that car. You may want to crank down the decel settings, but I usually don't do that too often, maybe 4-5 notches down for the ZR-1.
Make longer 1st/2nd gears if you're experiencing wheelspin (thus shorter numbered gears), and get some Super Softs. This car doesn't handle as well as the Grand Sport or the '96 Coupe, for some reason.