Hmmmm - not sure if that's something I want to do to a near 15 year old car with 114,000 miles under it!!
Mines done 150K+, and of a simillar age, but isn't afraid of a good thrashing.
Consider:- You can either treat the car like a fragile old lady or use it for what it was intended. If you opt for the latter, and something does let go, you are far better off on the track than you would be on the open road.
At the end of the day, if you drive any car to the edge if its, or your, limit something could go wrong. How much better to be in an environment where eimmediate assistance is at hand rather than to find yourself in a ditch in the middle of no where.