Open the valves further for example a .528 cam will be about .557 lift with 1:6's. Unless your heads flow in this area it won't do much if anything for power. It will be harder on your train.
I had gold race crane's and had nothing but trouble with them. They were 1:6's.
I currently have 1:5 ratio harland sharps. They are about 15 years old, never failed and hold lash like a bear trap. I adjust them once a year and I drive alot.
I would not buy the 1:6's again but they allow you to take advantage of ported heads or you can stagger a cam by only using them on the exhaust. Personally i'd rather make my lift with the cam, not the rocker.