The boards from Leo Bodnar should do the job.
They measure voltage so you must use all three pins on the pot.
The outer pins go to 5V and ground, the middle pin conveys the output signal.
The boards have their pins clearly marked.
Which one to pick depends on what you want.
Just take a look at their specs at
http://www.leobodnar.com/.The BU0836 series have analog inputs as well as digital button inputs.
The BU0836 is the simplest and cheapest option.
The BU0836X has easy to use connector, high resolution inputs and a bunch of other features but is the most expensive.
The BU0836A has a higher resolution than the BU0836 at a slightly higher cost.
The BU0836LC is useful if you want to use a loadcell for a brake pedal.
The G25 pedal interface is very compact but has only three axes at sthe cost of a BU0836X.
Here is a pinout:
G25 Pedals:
Plug - Wire - Function
1 - Black - Ground
2 - Orange - Gas
3 - White - Brake
4 - Green - Clutch
5 -
6 - Red - +5V
7 -
8 -
9 - Red - +5V
I would advise the BU0836 unless you want something that the other boards have.
It can serve as a nice basis for the rest of your simpit.