Driving cabs aren't simple like joystick cabs.
Start by reading the stickied Beginners Start Here thread to get an idea of how much of a PITA it will be.
There was no standard like JAMMA for driving cabs, so there is no consistency in how the controls are set up or how sensitive they are.
Every single game has to be tweaked.
The first problem is that you'll have to decide between playing "360 degree wheel" games where the original wheel used an optical encoder and spun endlessly
or "270 degree wheel" games where the original wheel used a potentiometer and had limited travel.
Being that your cab already has a 360 degree wheel, it would be cheapest to stick with that.
bkenobi posted a solution for using a 360 degree wheel with 270 degree wheel games here:
http://forum.arcadecontrols.com/index.php/topic,92363.0.htmlIt is is 14 year old info. I do not know if it works with modern versions of windows.
I'd steer clear of the Raspberry Pi unless you are very familiar with how to set up analog controls on whatever version of MAME it is using. I haven't messed with it in a long time, but remembered having much more limited options for tweaking the controls.
You'll need an interface that can simultaneously read an optical encoder for the steering wheel and a potentiometer for the gas pedal. My knowledge is getting pretty outdated.
PL1 will probably be along and can recommend something.