I was never good with that kind of math, but i did set up my pushrod checker yesterday to 9" which gave me 1 thread out the bottom of the rocker and my intake valve clearances were less. I did not write anything down and thought maybe my dial indicator was not quite the same position as when i measured with the 9 1/16 long pushrod. I discounted my figures and moved on because those results were opposite of what i thought they should be. That is interesting and worth noting.