Autolites are good plugs, as well as the NGK's. The 8mm Taylors would be fine. I've ran them for years without problems. I've ohmed out some of the wires that come from Autozone, O'reilly's, etc. and I'd definitely run my Taylors over those any day of the week.

 

There are a lot of good plugs out there.... if you have a good one a perfect plug aint worth squat but if you have the wrong plug it can definately hurt you.

Bret