I have a 1966 econoline supervan with a bad sending unit, and I can't find one specifically for my year and model. So if there are any other vehicles I can search for that have the same unit, any help would be great.

 

By "sending unit" do you mean the sensor in the gas tank? If so, they are bad about grounding, so your sending unit may be fine.

Drill a small hole in the flange in the corner of the tank. (not where gas will leak out)
and drill a hole in the van frame. Put a sheet metal screw in each hole and run a wire between the two, and see if that helps.

 

C2DZ-9275-A .. Fuel Sending Unit / Obsolete

1961/67 Econoline / 1960/64 Falcon except Ranchero, Station Wagon & Sedan Delivery.

NOS PARTS SOURCE in Olathe KS has 1 = 913-220-5746.

GREEN SALES CO. in Cincinnati OH has 6 = 800-543-4959.

WESLEY OBSOLETE PARTS in Liberty KY has 18 = 606-787-5293.
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But, do not buy one until you've checked the following:

The "usual" cause why the dash fuel gauge reads incorrectly, or not at all.

The fuel sending unit float is made from two pieces of copper soldered together.

Solder breaks down, gas seeps in, float slowly settles to the bottom of the tank.

COAZ-9202-B .. Fuel Sending Unit Float / Available from Ford / Carpenter sells a type that is made of one piece of brass.

Applications: ALL 1957/79 Passenger Cars/Trucks / 1961/79 Econoline / 1966/79 Bronco.

Unhook the float from the senders crooked arm, shake it to hear if gas is sloshing around inside.

 

Exactly the info I was looking for, thanks for the help!