98 SSEi - FWI, PEMS, and an Intense PCM - stock otherwise.
Stay with the stock gap or ?

.052 is what I would go with to start with.

But plug gaps are like tuning your car, every car is different. I seen some that run fine no matter where you gap them at, and other not for crap unless they're at .043

I figured that I'd at least get a better starting point. Those backside plug might be a B* since it looks like there isn't as much room as in my wifes Olds.

.060 is the stock gap. The reason people decrease their plug gap is to combat the higher pressures in the cylinder from blowing out the spark when you have turned up the boost.

I recommend you stay with the stock gap.

Ed

There is no reason to reduce the gap at all, much less to .052". There are no boost-increasing mods in that list.

Stock gap of .060" is just what the Doctor ordered.