Correct Wiper Fluid Reservoir for 1965 Dart

So I ordered a new aftermarket wiper fluid reservoir (Part #2497502) from a well-known supplier for a 1965 Dart GT with factory electric wiper fluid squirter.

The thing is, when I when to put it on, it is about a half-inch too short when I center the original screw on the other side. (see pic)

There was no reservoir when I bought the car but the electric motor and tubes are still there and there is clearly a dirty outline of the original reservoir. Of which the dirty outline template shows that a slightly longer reservoir sat there for a long time.

What gives? It is the correct part listed everywhere I can find. The supplier swears it is the right one.

It's not a huge deal. Other than slightly smaller, it looks identical to ones I've had in the past (except for my old 63 Dart had a plunger with a bag).

I can fill and redrill the one hole needed to fit the new reservoir but I just thought this was a little strange. Perhaps there was another slightly larger reservoir for the option on this Dart?

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