I've got a stock bottom end. Ported heads (stock) GT40 intake, and cam, alog with a few other things. Just installed motor. I did a 4cyl swap into a 93. The heads have 1.6 rockers on the intake valves and 1.72 on exhaust valves. Motor runs I fired it up tuesday night and was idling some what high. (1300-1500 rpm) I am getting ready to start trying to dial it in. Timing is advanced 10 degrees. Now when I bring the idle down she surges a little and wants to die. I am wondering if anyone had any input as to where to set my idle/timing to get a decent idle. I was thinking leave the idle high for now and retard the timing a little .. I dont know yet with the way the rockers are set up. Keep in mind I didnt build the motor and when I got it the timing was retarded tremendously and there was nitrous running to it.(no longer going to use this)