[Lynn]

I would make sure it is timed properly before swapping out parts.... even if you are going to swap the exhaust eventually.

I can promise you that you can use a dial back timing light. Once you see it hooked up and figure it out, you will see how simple it is. You really don't need a dial back light. Assuming you have an 8 inch damper, and assuming the single mark is Zero, 10 decrees advanced will be 1.44 inches from the single mark.