You might want to consider changing the fuel rail and regulator out to 97-98 vette with return line for the fuel system and modifying the return lines to fit since the 99 only has fuel line unless it's been changed out. The A/C will hit the frame on the passenger side so you can either buy a relocator bracket from S&P or notch the frame. Not sure if the headers will fit or not, you'll have to see once you get the engine in but most hit the upper A-arm unless they are shorties. I'm having some custom bent to keep from hitting the ecentrics. I'm not sure if you're running a tach or not but to make the stock tach work you will either need to talk to Dakota Digital, Autotech or maybe someone here can help you with a module since you're going from one coil to eight. Good Luck!


You might want to talk with RedHeartBeat, GMCWantsLs1, PSWired, farmtruc or some of the other guys here for more help.