Aslong as your 100% positive on the firing order, you can play with the dizzy by "sound" if your not confident in doing so, you need a timing light, but I'd DEFINATELY check and recheck the firing order:D
Advance the dizzy, you'll here the revs climb marginally as you do and see if it improves, if it sounds as though its struggleing to start, you'll know when you hear it;), its to far advanced, but keep in mind when you road test to listen for pre ignition, better known as pinging

