Also dont forget that IF you were to buy a GST/GSX, it would run you about 2000$ more than a GS or RS. So there goes your turbo kit :)

I say the thing that limits the 420A is the fact that it uses a MAP sensor and it ECU. Its obvious that the Karman sensor type is much more suited towards boost than MAP. Plus the fact that our ECU freaks out if it reads any sort of boost, and even if a hacked MAP is used it still freaks out with timing and ignition.

I think if someone made a ECU/Sensor combo pack which replaced the MAP sensor with a Karman, and redid the ECU to actually see boost and like it, we would be in the clear. But that would probably cost wayyyy too much for anyone to actually buy it. Or at least modify our existing ECU to be more lenient with boost.

Thats my .02 cents :)

And yes, you can measure crankwalk. Any mechanic with knowledge in DSMs can help you out. Youd have to bring him along and hed have to get under the car, but they can measure the amount of play in the crank and see if it is out of spec. Also if you test drive a GST/GSX that has bad crankwalk, when you make left turns the clutch should stick to the floor. Safest bet is to bring a mechanic along to look at the cars with you, and get a warranty with the car :)