stock cam, well i hooked up a tach and disconnected the vac line and plugged vac line, made a new timing mark on the balancer as per instruction to give me a 35 degree mark. brought the motor up to about 2800 rpm's and then adjusted the dist till the new mark was at 0 tdc. snugged down the dist clamp and checked my initial timing and that was at about 11-12 degrees after tdc. runns good and i was able to break the tires loose and no pinging.