Engine block cylinder numbering . Checking my sanity

[FERGTS246]

My manual says cylinder numbering on the block is:
Looking from the fan: Left  2 - 4 - 6.  Right 1 - 3 - 5

However my engine numbering is:
Looking from the fan: Left  6 - 2 - 4.  Right is the same as the manual.

The manual says firing order is 1-4-3-6-5-2

My question is should my firing order change to 1-2-3-4-5-6 to accomodate the different cylinder numbering on my block compared to my manual. I know this can't be right but I just need it confirmed as I'm going mad trying to work out why my left bank of 3 cylinders isn't firing properly, if at all.
Thanks
Chris

[Richard Fridd]

The stampings refer to the cylinder numbers not the firing order. 1 at the front and 6 at the rear of the engine. Don't change the plug leads from how they were when things were working properly.

  Richard