And I wonder why i hard time setting the timing...

Glad to hear I'm not the only one having damper issues; I had my builder install an SFI inertia ring damper by Professional Products. damn thing slipped the ring after 5 pulls on the dyno and 50 passes, stroker started vibrating, replaced it with a ATI super damper....Although the PP damper was $260 it is MADE IN CHINA.....never again:banghead:....its a boat anchor now!