So with a #o full plate pushed all the way up, and afc wfo id only notice a difference at wot

with no afc and a true 0 plate pushed full forward you would notice a difference when you push the throttle. It will be a smoke pig down low which is not at all what you want.

I think he was referring to the plug making a difference only at WOT ...

It only ever will.

Thats waht were being told ... I dont spend that much time there so I'm thinking this might be a waste of money for me too do ... I aint racin yet !!!

Me either. I'm much more interested in how fast it is without wringing the hell out of it than in how fast it actually is.

Good towing power is far more important ... The occasional 1/4 mile trip doesn't really seem worth anything more than a good plate and AFC tuning

Seeing as how I spend about 30% of my time pulling trailers that weigh twice as much as my truck... yeah.

Yeah, towing and racing WOT .. kinda two different animals when it comes to tuning it in