You will need a engine scaner. But you can go to a Advance auto parts store and they will scan the engine for free. NEUTZ
Take the air cleaner off and look to the left of the throttle body housing and you will see a FLAT squire black plastic piece about the size of a pack of smokes but FLAT bolted to a bracket on the intake that will have a wide flat electrical connector pluged into it. That will be it.
1-8-4-3-6-5-7-2 Clockwise on the distributor cap. Drivers side head front to back is 1-3-5-7 The other head front to back is 2-4-6-8