You are crazy if you run a space saver on the front axel. Remember your fronts do all the steering and virtualy all of the braking in an emergency. Do you really want one side with significantly more grip if you really need to slap on the skids.

Your manual will state rear axel only. 80km @ 80 kp/h. If you want to be a test pilot go right ahead but can see your insurance company being interested if your running a space saver well past stated limits and you bin it!!!