Duh.
Goddamn what a retarded question.
My build date is 03/04. How do I find out if I've got 9 threads??
I'll be replacing my plugs soon.
You could carefully use a small piece of putty and press it into the head to get an impression of the threads. I don't know what kind of putty was used in this photo, but you get the general idea. http://stangshiftergaskets.com/2003_2004faqs.htm#_Toc35092462
Um no...you'll be able to tell just by how many turns.
What are you guys gapping your tr6,s at to avoid blow out?