the only adjustments you need to do is with the fueling. apart from that it's a simple bolt on kit. i've mentioned on PW before that many owners of chrysler crossfires in the US have fit the blower from a C/SLK32 on their cars for instant "fun". as the M112 block is more or less the same (regardless if 2.6, 2.8. 3.2 or 3.5L) there is no need for any mods.
Going for a turbo on this block WILL lead to you stripping the engine appart as it cannot handle too much boost (more than 8PSI and you will bend your connecting rods probably). BTW as yours is a 2.6 variant it'll be slightly stronger than the 3.2 version due to thicker cyl walls.
if you want real power either go for a 3.2 or 3.5L engine swap (still using the M112 block), the main reason there aren't many other options is that nobody wants to mod a small engine everyone wants to start with at least a V8.
BTW what exactly did the previous owner do to take this car up to 210hp? Do note that this is a 40hp gain and nearly the power of the base 3.2L which is something that even the best tuners in the world have not been able to do with this engine (at least not without changing most of the internal parts etc.). i think the exagerated claim of 210 hp is beyond false. most likely (if anything) the engine is not producing more hp than stock, it's the torque which fools you.