Ok so i just put in a 327 it has l31 heads the cam is a gmpp 223 duration @.050 valve lift .447 but I’m using 1.6 rockers, rpm air gap and a 670cfm holley tbi on top. I can get it to run but at idle it seems to flood it out and die. the current setup is timing is at 4* at idle the tps is at .58 fuel at 9 psi. I was wondering what sensors I need to change and will it run on a 305 ecm with a stage 1,2 or stock they all have the same result. and did i put in to much cam? by the way it is in the 89 if you check out the sig that was the old combo.

 

your going to need to tune it yourself. That combo is way to far from stock to put in a generic chip. The larger cam is going to want more timing and less fuel idle. The catch though, to fuel it up high, and control knock, you cannot just drop the fuel pressure and advance the timing. It probably time you start reading up on the info in the DIY PROM board.

If it is a brand new motor, don't run it too much, if you are that rich at idle, you are probably going to wash the cyl. walls, and your rings may not seal properly.