what you think of
 

the E3 spark plugs? i was thinking of getting them for a spring tune-up, they say more hp and mpg

I never heard good things about em when I worked for Advance Auto Parts. They didn't sell much but I don't know anything for sure on them.

I have a set in my 98 S10 Zr2. They have work great for me.

the best plugs you can get are the AC Delco stock plugs.

I agree, delco is the best for the truck. Remember the spark with always find the shortest route to ground. You can have ten electrodes, but 1 will always be doing all the work.