I want to make sure I have this correct for everyone;s reference, so if something is incorrect lets set it straight. If we are running the stock ignition system the following settings are to be used: Buick DIS box checked in setup Crank Reference angle in software 10 degrees, max timing we can run is 50 in this set up Cam sensor is installed at 25 ATDC referenced from #1 TDC The resulting CAM SYNC logged data should show 85 BTDC if installed right. Inductive delay = 96 uS. Cam precedes =#6 firing order 165432 If we are using a msd crank trigger and IPU cam and crank sensor with a distributor non-waste spark: IPU mode checked Crank Reference angle 50 degrees, sensor lined up centered in magnet at 50 degrees, max timing we could run is 40 in this set up.Single tooth centered in distributor Cam sync can be set at any number from 60 degrees to 120 degrees referenced from #1 BTDC., But you would not want to be near 120 degrees since this would be the start of the next cylinder. I would suggest 80-85 degrees. Inductive delay =40 uS Cam precedes =#1 or #6?????????? firing order 165432 Note : items in red I need to have confirmed this is correct. Still a bit leery on the cam precedes number.