You don't have a cam sync with a TBI engine only the magnums. You set the initial distributor location the same as you would a carb engine then after it is running and up to operating temp you disconnect the coolant temp sensor. That sets the computer in limp mode. Set your base timing there. Reconnect the coolant temp sensor and cycle the ignition key. It will probably set a code but may not turn on the MIL if you only do it once. Clear the code and you should be good to go.
When you set the base timing what you are doing is setting the maximum advance the engine will ever get. The computer retards the timing event controlling the amount of advance.