Ok, the firing order is 1-5-3-6-2-4
The distributor turns clockwise as viewed from above. If the image I have is true to real life, the closet plug to the engine, is the 6. Then as you go clockwise it is 2 then 4 then 1. The 1 is the furthest away from the engine. Then of course the 5 and then 3 are the rear ones.
Hope this helps.