1996 4.3 w engine spark plug gapping and cleaning question

I have a 1996 4.3 one.
 
i have checked the spark plugs, the are  .070 gapped,  we have 95 octane unleaded fuel here, we dont have any 87, shall I gap back to .060 w/ 95 octane ?  ( AC Delco plugs)
 
Also, I have spark plug cleaner which is media blasts the plug, ( the ones that harbour freight sells) , it this harmful for platinium plugs?
 
Thanks.

Don''t clean the platinum plugs. Buy new AC/Delco and gap them at .060"

Thanks for the reply ;)
 
I ll go and buy a set of them.