Yamaha FG - 335 neck reset

[misha_da_luthier]

Hey there, I have a Yamaha FG - 335 which I believe is of the 80's era. It's actually a great sounding dreadnought with lots of tone, however is requires a neck reset.
Does anyone know how Yamaha joins their necks? Also, if you know which fret to drill under as well please inform me!
Thanks