stock is what came in the crate..
changing valve angles is not stock..
cleaning up ports is not stock
changing gear ratios(sprockets) is not stock..
fecking with the computer is not stock..
rejetting is not stock..
changing the exhaust is not stock...
back in the old days you could take a car and blue print it..stuff 5:50 gears in it, replace steel panels with fiberflass/aluminium..and this was not consideres stock...it was called super stock..this car off the show room floor might turn 15's, with these mods the fecker would turn10's....
i dont believe a "stock" 600 will turn in the 9's........yet!