Buff; if you can access the assembly instructions of the arf that will give you the info needed.
As for the comments about the errors on the kits, remember this. These are/were made for the average builder anywhere. So a guy in Podunk Nowhere could build a P-51 and when his buddies see it they see a P-51. They don't see the lines that are off some, just a Mustang. So do as a friend of mine told me, see these kits as starting points for what you want to build. Correct them when and where you desire and enjoy the hobby.
Allen