Here's what i do every time i have to retime an s13:
Start by pulling the number one plug and wire. Stick your #1 plug boot back in the hole and make sure it's somewhat sealed.

Crank the car until it pops out of the hole.

Set it at the tdc mark on the crank pulley.

When inserting the distributer, hold the rotor at approximately the number three spot on the dizzy (will turn to the number one spot when you slide the dizzy in.) Might take a couple tries to get it on the right tooth but just mess with it and see where you get.

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