Will a V6 block from any year fit a '14 V6S or are there differences? Basically looking to swap my blown motor out for another preowned, just need to know if all of my current wiring and accessories will work with a newer block?

 

Pretty sure the AJ126 block has never changed so you should be good to go.
With one possible caveat - the sump pan area/fixings on an AWD vs RWD as the sump pans are different.
I doubt there is a difference but just maybe.

 

As stated above, if you get an AWD motor for a RWD car, you will need to swap out oil pan. Don't think it fits correctly in vehicle due to clearance issues. Other than that, a straight swap should work. Try to get one from another F-Type to keep confusion down.