Seeking Advice on 64 Gas Tank Sending Unit

[Andy Barnett]

I have just removed the sending unit from the gas tank of my 64 Eldorado.  Previous diagnoses indicated a failed unit and thta is indeed the case.  There is a brass (??) strap connecting the resistance / float unit to the gauge connection that has broken.  Downstream of this break the resistance measures from 0 Ohms to 35 Ohms as the float is moved from "empty" to "full", so I think the resistance unit is OK.  

Can this unit be repaired, and if so who does such repairs (in particular in the Brockton, Mass area).  Im assuming simply soldering the connection back together wouldnt work due to chemical reactions with the gas.  

If a new sending unit is the best option, where is the best source to purchase one?  USA Parts Supply only lists units for 46-49, at $149.

Can a unit from another GM make be substitued?  

Any suggestions would be appreciated.

Thanks.

On another note, someone rust-proofed the underside of my baby.  Is this original?  It made removing the tank somewhat difficult but ti is otherwise in pristine condition.

[Rhino 21150]

A GOOD welding shop could repair the brass, if it is brass, with a wire brazer, or brass welder. If you cant find someone to do that, try: http://www.jcwhitney.com/autoparts/Product/showCustom-0/Pr-p_Product.CATENTRY_ID:2005714/c-10101/Nty-1/p-2005714/Ntx-modematchallpartial/N-10101/tf-Browse/s-10101/Ntk-AllTextSearchGroup?Ntt=fueltankfloat TARGET=_blank>http://www.jcwhitney.com/autoparts/Product/showCustom-0/Pr-p_Product.CATENTRY_ID:2005714/c-10101/Nty-1/p-
or this part number:  ZX132950R
Good luck!

[JIM CLC # 15000]

05-28-06
ANDY, I do not see any reason why you can not solder the brass strap,only, be sure to butt solder the broken strap because if you lap the broken pieces you may change the resistance of the brass loop.
As far as knowing where to get a replacement, I would not know.
But you may want totake your part and check a BUICK parts department or Chevrolet-truck parts department may be the same.
As for the under-coating. probably applied by the saleing dealer altho a lot of independent shops were appling it.