I decided to get NGK plugs instead of Autolites just to try them and see how I like them. I slapped the fresh set in yesterday and today was so nice in Md I took the 63 for a cruise. Running great and I hope to get to the track in the next month or two. Seems alot of people like the NGK's so I thought I would give them a try. They cross referenced the Autolite AR3935's I was using with the EZ heads. Ron