I am trying to replace the original fuel pump in my 87 Grand Natl'. I bought one from Auto Zone and it was too short, so I special ordered one that was supposed to fit from O'Reillys: same problem. And now I ordered one from Holley and it is supposed to be fit stock. Does anybody know if they changed the length on the fuel pumps for good? Or was I just getting after-markets from Auto Zone/O'Reillys?