I just now changed the plug and it's a lot better ... still does it but very occasionally now .. Not every time I take off or accelerate, now
The plug that was in there looked like it had been fuel soaked .. the electrode was still a little wet looking at the top of it (but the plug doesn't have any fuel or oil smell to it) and there is a white coating over a lot of it
Plus - some idiot put AUTO LITES in there - soon as I have extra cash I'm going to put delcos in and fresh wires on all six