Finally after a couple months of runnin a 6lb'er on stock plugs, I did a plug change today. I went with NGK TR-6's gapped at .040. It runs a lot smoother. My stock plugs looked fine.. a bit rich but thats good! I changed plugs in about 3 hours. Not bad for my first time, but now that ive figured out a couple tricks and whatnot, im sure next time I could do it in just over 2 hours.

-Mike

 

Good to see the stock plugs lasted.
From what everbody says it is the heat that kills them.

VINNIE

 

You guys are alot braver than me running stock plugs with a 6 lber

 

Glad you got them old stock plugs out of there with no problems.

 

I did it in about the same time. Makes you feel proud after it's done right. Welcome to the C-MOP. Changed-My Own Plugs.
If you were running rich with the stock plugs, you may have a problem going two steps colder to TR6's, but as long as you beat it regulary, you should be fine. I was also running a 2 to 3 upper and a 4 lower for a few weeks before the spark plug change.
Mine looked like this:

 

TR6's should be fine with a 6#, think they're one step colder