alright guys im a little confused. i installed a solid lifter cam into my 460. everything runs pretty good and i get that quite and sometimes loud lifter noise you know.. but what im wondering is i called crane cams and they said "twenty thousands valve lash" but the tech sheet says 0.020 in my mind 0.020 is "twenty hundredths" so which is it? what feeler gauge do i use? 0.020 or 0.002? i have both but 0.002 seems really small and i might as well just set it to zero lash when its cold and thatll do the job... but if its 0.020 then ill use the gauge while its hot... also ive had to adjust the valve 3 times... within 400 miles and i dont drive it rough...