[hobgoblin351]

If that Bosche plug screws all the way in, it looks like the autolite is a wrong plug. Looks like it will never reach the combustion chamber. People make mistakes. It's possible they gave you the wrong plug, or that the trick heads dont use the stock plug.
I'm running a Cleveland, and anyone who has changed plugs on one knows IT SUXX! I usually run Platinum plugs just so I dont have to change them too often. Right now I've got a set of splitfires in there. They seem ok, no big difference. Like he said with a highfire ignition any plug will perform. Heat range tweaks are always good to ensure a good and total burn. Hell you can even set the electrode so that the gap faces into the chamber if you want to go crazy! lol