It is unclear whether you intend to use the model servo motors for drive or for control, this is, steering. For steering, they should work fine without modification, as wonbinbk suggests. For drive, you will need to be aware that their rotation is physically limited to about 100 to 120 degrees. The stop can be removed, but then you need to deal with the feedback pot, which also limits rotation. I believe you will find some references on using the motors as drive motors, for example by replacing the feedback pot with a fixed resistor. Good luck.