If your planing on swaping the 2.0 non-turbo(420a) to the 2.0 turbo(4g63t) your problem will be that the motor and transmission are on opposite side of one another. My GST has the trans on the passenger side and the motor on the driver. The 420a is just the opposite. If your serious about it you should get the motor rebuilt with higher performance crank, pistons, rods, exc. And they make turbo kits for the 420a. But you'll need better fuel delivery and some mild tuning.
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how much boost are you plan on running? if more than 9psi you will need stronger rods and pistons. 420A engines will not hold more than 9psi for too long. if you only plan on running low amounts of boost go with a 14b or a small 16g with a internal wastegate, walbro 190 fuel pump, fuel cut defender. u will also need to weld in a fitting on your oil pan for the turbo. if you need any more help lmk.
feul pump, ECM and allot of sensor changes.
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