I used to tow with a VS V6 manual and it was OK though it wasn't ideal as the car was a little bit too small/light to tow another car on a trailer. It had power, brake and suspension upgrades. I wouldn't recommend using a standard VS as the brakes are way too small - even when you aren't towing!
I now have a VE SV6 and it's great for towing. No mods, and no issues at all.
The black evo driver at the track day has a VE SV6 wagon and borrowed my trailer to tow his evo up to Queensland for the evo nats and he loved it. I wasn't entirely happy when I heard the speeds that he was driving at while towing though he said it was all 100% stable.
In summary, you don't need a truck/bus/tank to tow your race car.