Sorry to say we haven't dealt with many "blown" vehicles. The last one we did have in the shop was a supercharged 308 dunnydoor, that had shitloads of mumbo but no attention to things like rear trailing arm bushes and decent suspension. After we tuned it I drove it in the wet, and it would literally change lanes, (with the steering wheel dead straight) when it came on the power. Bloody lethal in the wrong hands! I suspect the gentleman that owned it used it to escape the forces of law in his chosen line of business.
Happy to help if we can, drop in and see me sometime.
Penrith Ultra Service 3/160 Station St Penrith