paulfun
"King Of The 1/4mi (Internally Stock)"
I agree that you probably will not see any benefit!
I have observed no difference.
Please note I do not have any reference for lifespan of the plugs as all conversions I did were for others.
My observations were based on starting, how fast it appears to rev with one verses the other.
My basic carb tune combined with the coils produced the same Dino results with both plugs and was consistent with my anticipated results which mirrored the same 105 hp at the rear wheel with standard ignition.
From what I read about iridium spark plugs only benefit is that they last longer than standard plugs.