Go for it! 996/997s make great track cars. Get a good PPI (including the overrevs), install the upgrades if not already done, then drive the snot out of it. If a true dedicated track tool then you will prolly be looking for the edge a lot more than a DD. So chances are you could ball it up before the engine grenades anyway
As DAve said "WTB trailer" IS in your future. Even if it's just a tyre trailer