To prevent any cooling issues I got hold of a PWR alu rad from FM.
Probably not an bad idea considering the air has to go trough both the bigger IC and the AC.
If this wont work the Qmax coolant reroute looks promising. http://forum.miata.net/vb/showthread.php?t=261947

Some pictures of the install.

The new rad got a thicker core than stock. The alu end tanks will also help dissipating heat.


It was a tight fit but no real problems. It cleared the sway bar without problems.