Alright so i'm upgrading from points to a Petronix ignition kit. So I'm pretty sure I can figure out how to install and I got a timing gun. Also from what I researched the firing order is 1, 3, 4, 2. Or at least that's order of spark plug wires on distributor. The cylinders are ordered 1, 2, 3, 4 straight across. I don't know what to set the timing at for each plug or how to adjust. This will be my first time doing this and using a timing gun. I have a L20B by the way also near the belt i see this... well idk what it is but at the end its got little teeth and i see numbers on it that say 20 10 10 in that order. What does that mean? Sorry for the scrambled and numerous questions. I can post pictures tomorrow of exactly what I'm seeing.
Thanks