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I would start with about .030 and see how the car likes it. Depends on how much total timing you are running, as well as engine cr, ect. Quite a few varialbles, but should be good to get you started.
Thanks for the input I am taking the car to the dyno to have it tuned but I just wanted some opinions as I am new to this forum. My car is a 2000 SS that currantly runs 10.30's on a 150 shot. again Thanks for your input.