348 Help identifying alternator

I'm purchasing my major service kit from Ricambi and could use some help identifying my alternator. I was hoping these pictures provide enough detail that somebody could tell me whether I need the Delco or Nippendenso retrofit as my battery is located behind the rear drivers tire.

Image Unavailable, Please Login 348 Alternator by John Smith, on Flickr

Image Unavailable, Please Login 348 Alternator1 by John Smith, on Flickr

The other question I had was the fuel filter size, there's the 152 MM or 129MM. I stuck a tape measure down and hooked the bottom of the filter canister, it measured 5 inches, roughly 127MM...but I wasn't able to look perfectly level of course. Also, I'm not sure where to exactly measure from on that. I was hoping somebody could give some direction on that. as well.