Need help fast! Ac delco 41-110 plugs use or not?

I've battled with this long enough I'm ready to just put the platinums back in. I searched and searched for a ac delco iridium plug for my av and finally Napa sold me 41-110 and said they were for it. I get ready to change them out this morning and realize they are way under gapped. I've been told to not attempt to re size them. Book says .060 and these are like .040. Does delco make a iridium or is there one better. Please help!! Thanks in advance!

I saw a GM TSB on the 41-110 plug gap question. The short version is basically as follows....
  The new Spark Plug has an Iridium tip instead of the Platinum tip. Due to the different tip design, the Gap of the Spark Plug has also changed. AC Delco P/N 41-110, is Gapped to 1.01 mm (0.040 in) when the Spark Plug is made and should not be changed as damage to the plug will occur.

I changed mine about a week back and the truck has been running fine.