No, I haven't run either head and at this time have no need. I will on my big motor (which the short block is already assembled) and and at that time I will buy heads.
No, I don't know it all so get your panties out of a wad. I apologized to the first poster that I offended and have no intentions of doing it again.
If you think that it made a good difference on your motor I could't be more happier for you.
The above times that were posted are great and that cant be disputed. The poster picked up "almost" 2 tenths and with that hp range that is nothing to sneeze at.