I am aware of the beehive springs available for the 392 engine. Since moving to the T&D rockers on my stocker 392 race engine, I have found out I need a better valve spring. I used the new 1515 PSI spring and experienced valve float at a relative low RPM (7000). Has anyone used a dual spring instead and what part number would that be? The PAC 1209X looks like it would work, but has anyone tried it or something close. Thanks, Dyno