Is there any way to upgrade the spark with the stock ignition?

I think there was a detailed How to do it on the site but the link doesn't work... I called MSD and they told me there was 2 differents stock igition parts for the ecotec ? one upgratable with the MSD DIS-2 and the other not ... ?

Is there something to do without replacing the stock ignition module ? I am trying to eliminate an intermitent ramdom missfire issue and I don't want to spend to much money on it...

Any info would be appreciated.

Thx!

Should I get the stock ignition upgraded with a MSD box or the stock ignition is suppose to be sufficiant for 10 pounds of boost?

Can I solve a P0300 cel with the ignition upgraded or I better rescan the car with HPT?

The car was already tuned by a local shop on a mustang dyno but not perfectly, running a little rich on startup and between 3300rpm and 4000rpm at wot. After 4000rpm at wot I get consistant 11.4 and 12.1 @ 7300

I already changed the ignition module and tried two different sets of spark plugs and different gap from .030, .035, .042

What can it be ? sensor ? mixture ? ignition ?

Any help would be great,

Thx!