Pms shifter won't fit as you have to use the meg one [emoji19]
Sent from my SM-G981B using Tapatalk
If he keeps the clio box it should fit ok.
In terms of heat, with general driving and even on track I had no issues with coolant temp, it was inlet temp which rose very quickly. Ideally get a good intercooler and even a second vented or louvered bonnet for track use as it's getting the underbonnet heat out which is the real issue.