Cam Rocker Ratio Choice

First, most motor builds do not achieve the lift of the cam due to loss in poor geometry. For example, if you buy a .500 lift cam and use the factory rockers/push rods, you'll most likely never get .500 lift. So, just keep that in mind. Second, I wouldn't try to add the lift I want through the rockers. I'd pick the cam I wish to run then if anything, try to correct the geometry so that I actually got the lift I hoped to get.

P.S. - my dirt road builds run poor geometry... lol. Just a FYI.