What size spare for a Dart Sport?

I bought a new spare tire cover and trunk mat for my son's '74 Dart Sport. While getting the trunk cleaned up and ready for a car show last week, I thought I would drop a spare tire into the well to provide some support (didn't want the cooler and folding chairs to cave in the flimsy pressed board cover). Even though the tire was one originally on the car, before replacing with larger ones, it was too "thick" and the cover didn't lie flat in the trunk floor.

What size tires were used for spares in these cars and fit properly in the spare well?

Jerry

Prob E78 x 14

try a 185/R14 European type tire if you can find one.

a 185/75/r14 is about 7.3" wide.

If you could find an old bias ply tire at a yard sale,
they would be narrower.

When I put the fuel cell in my 73 Sport I did not have rom for a regular size tire. I made a box and covered it with carpet to cover the fuel cell. I am using a space saver spare from a 96 Jeep Cherokee .