[Nickshu]

Its not that hard to remove the front drive, many people have done the C4 to C2 conversion. And can be changed back if you want later.

That factory Aerokit is highly desirable on the 996.1s. The full Aerokit was not offered on the 996.2, only the wide rockers and a different spoiler as individual options.

That spoiler is referred to as the "taco wing" and was part of the factory Aerokit.

The 3.6L engine started in 2002. While it has some minor improvements from the 3.4 there are many who prefer the 3.4L because it's more rev-happy and "zippy" feel with a flatter torque curve. Both cars have similar IMS issues regardless of single row, double row, etc. The 3.6 has a more simple timing chain setup, does not have plastic spark plug tubes, and some other minor changes that do improve durability but not really that much, not to mention more HP.