But it's an expensive conversion and how much stronger is the MTX in reality? Who has really pushed one?

It looked like close to £2k to me using Jano's bits, including the Quaife diff. That's alot of money if its not a certainty.

We can supply and fit a full OS-Giken 5 speed gearkit including shafts to a 200SX for only a little more than that.