Mechanical Rocker Arm Ratios...

Easy to check for accuracy. Mock it all up and check the lift at the valve with a dial indicator, then subtract the lash. I've checked stock, Isky, Erson and Crane like that through the years and they were all pretty much right on top of their advertised ratio. I saw somewhere recently someone here said the ratios on the Isky and Ersons were lower. I've checked them myself several times and found that not to be the case. Maybe I was doin something wrong.