I've checked all over, motorsport doesn't stock fuel sending units, neither does nissan, does anyone know where to obtain a sending unit?

 

forgot to add, its for a 77 fuel injected

 

I was wondering the same thing after I had my tank completely cleaned and redone, I couldn't find anywhere to get a new one. So I just carefully cleaned my old one up as best as I could and re-used it. It seems to work well.

 

that seems to be the only choice, I have two of them but their in ruff shape

 

When I bought my car, the gauge would work fine in the upper more full half of the tank, and then when it got to half, it would drop to Empty. While disassembling the car to rebuild it, I pulled the tank and sender. Some of the little wire coils had slipped, and there was a good bit of corrosion. I carefully lined the coils back up, used about a half can of contact cleaner / deOxit, and cleaned everything with q-tips, dremel, or steel wool as appropriate. Works great again. There are reconditioned senders out there, but you'll pay:
http://www.zcarsource.com/content/p/...ge_refurbished
cheers,
Dave