[Lew Silverman]

So in the example that Greg gave with his 327, a camshaft with a lobe lift of .260 and a rocker arm ratio of 1.5 would give a theoretical lift at the spring retainer of .390, as specified. Could you not also use a camshaft with a lobe lift of .24375 and a rocker arm with a ratio of 1.6 to get the same lift at the retainer and still make spec? It would also, I think, open the valve faster and improve cylinder filling. Another reason to fabricate a head dyno!

Lew