I'm running an MSD ignition in my 01 blazer, noticed a little difference in power and about 1-2 MPG more, wondering if anyone else could give me their thoughts on that. And also maybe some suggestions for spark plugs.

 

Platinums if you want longetivtiy. With the stock timing, and cam, I would stick w/ AC Delcos. NGK coppers if you wish. Iridiums? Don't gap them, they will break.

A 50,000 volt coil. May not see much though.