2000 5.0 HO misfiring

I'm having misfiring issues.  2000 Nautique Open Bow, 5.0 HO PCM, throttle body fuel injection, AC Delco HEI ignition.  It has new plugs, cap and rotor, fuel filter. Wires show no sign of wear and resistance measures ok. Coil wire measures 1.2K ohms. Coil measures 1.0 ohm primary, 7.9K ohms secondary.  Engine starts right up but when idle settles to 700 or so it runs rough and idle oscillates to make up for this.  Under power still misses, severe lack of power. Fuel appears to be spraying fine from the fuel injectors.  Pulling plugs after it has ran for a bit shows none fouling more than the other but have black soot built up fairly quick.  Have a timing light but there are warnings on how to properly connect it without damaging the Ignition Control Module. Looking for advice how to progress from here.  Thanks in advance.

Glen

It's a Chevy so the distributor turns Clockwise and if you're going clockwise around the cap with your  1 8 4 3 6 5 7 2 firing order and it runs, it's the right firing order.

You could try the firing order on the valve cover and turn it into an engine that doesn't run. 

I think I'd ditch that sticker or at least cross off the firing order.