May have been asked before, (if so, where can I find it??!!)

But, Wondering how hard and what's involved in swapping an Auto Box out of a NK 3.5 and putting in a manual??
I Hate Autos, but Know where I May be able to get a 97NK for a reasonable price. Only catch, Auto Box.
Anyone been crazy enough to do this? Any Probs? Anything to be aware of?
Also, Does anyone know if an AirFlow snorkel from a Gen 1 will fit a Gen 2??
Any all help appreciated.
Many thanx in advance,