57' Cadillac Whitch Fuel Sending Unit Is Correct?

[Coupe Deville]

Hello everyone. Its time to buy a new fuel sending unit for my 57 Cadillac. I started looking online and two on ebay had the best price. The two on ebay are different from each other thou. They both say they are compatible for the series 62 but which one is correct? Unfortunately, I do not have my old one to compare it to. Anyone know? Which one is in your 57?
Here are the two links.

1. http://www.ebay.com/itm/1957-1958-Cadillac-fuel-tank-sending-unit-/350569015470?pt=Vintage_Car_Truck_Parts_Accessories&fits=Year%3A1957%7CMake%3ACadillac%7CModel%3ASeries+62%7CSubmodel%3ABase%7CEngine+-+Liter_Display%3A6.0L&hash=item519f8aa8ae&vxp=mtr

2. http://www.ebay.com/itm/57-58-Cadillac-gas-fuel-tank-sending-unit-NEW-/360924994546?pt=Vintage_Car_Truck_Parts_Accessories&fits=Year%3A1957%7CMake%3ACadillac%7CModel%3ASeries+62%7CSubmodel%3ABase%7CEngine+-+Liter_Display%3A6.0L&hash=item5408ce5bf2&vxp=mtr

Thanks

-Gavin

[Walter Youshock]

It's hard to tell from the photos.   As I recall, the float arm has a bend to it but,  if these are new replacements, either could work fine.

The mounting plate of the second one looks more correct to me.

[59-in-pieces]

Gavin,
My knee jerk reaction to buying off Ebay is - don't buy an "also ran" - "fits all" part.
Check out the Master Parts Book or an Exchange Manual to get as close to OEM as possible.
Have fun,
Steve B.