They're just telling you from experience. Driving your friends turbo car a few times is nothing compared to building,driving,and mainting a 500whp se-r. The tourque steer can send you into on coming traffic in a split second,you can spend a month doing you swap,spend $10k get everything just right...Then something breaks that you never expected and ruins all the work you just did. Also be sure you are very mechanically inclined, meaning you can do your own swap,replace a clutch,tranny etc, and get used to buying axels!!