As far as rocker arm ratio, that's a function of the length of the arms on either side of the rocker shaft. It can increase the valve lift over the cam lift.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
