So how often does everone change their plugs? I have always used the AC plugs, but my dealer sells the NGK. Anyone had any luck with the RAPID FIRE plugs?

Wait for Just Once to tell you how he found the best plugs....
Speaking of plugs, anyone side gap?

Where can i find 8mm or thicker plugs?

just tryn to squeeze ever last .1 hp out of the 4.3.......

I think most people replace them every spring. Kind of sad for the price of AC's considering you put maybe 100 hrs max on them. I imagine thats not much running time compared to their automotive application. You could go longer by winterizing (fogging the engine) with a set of cheap throw aways. I guess yo have to weigh the price vs. the headache.