thanks guys for all the info, ya it woudl be the #6 plug.!  i called napa and they said they have two inserts, helicoil and
another one the guy said was just the 'regular' one, whatever that means.  the timeserts site says napa will have them, but the guy said he didnt know what it was. i'll have to go there on monday and show him and see if he has it.  i think i'm leaning toward the timesert instead of the helicoil if i can get it.
later!