Tech-I wish you'd take the time some day to reconsider the 1.6 rockers on the sbc-there are a few reasons that they are a good/decent choice--------with so many engines ending up getting small base circle cams to clear the rods on the sbc, the profiles of the cam lobe do get some serious restrictions---------its difficult to get the higher lifts at the valves with even the 1.6 rockers vs the 1.5 but they really don't add as much strain to the train ( poem?) as might be thought because the long part of the arm only sees what comes from the valve/spring combo and the short side the additional leverage needed to multiple .1 more force. There ar rasons practically every engine uses the 1.73, 1.75 ratios and these days even up to the 2.2 area-------makes the cam lobes more lemon shaped compared to egg-------