I can't see the heat thing being an issue, it is only dissipating heat when you are under boost and you aren't under boost at idle when radiators traditionally could have a problem with heat dissipation. Only when the car is moving will a front mount produce any significant heat and in that case there is usually plenty of airflow if you are boosting.
Former owner of '99 CSVT - Silver #222/2760
356/334 wHP/TQ at 10psi on pump gas!
See My Mods
'05 Volvo S40 Turbo 5 AWD with 6spd, Passion Red
'06 Mazda5 Touring, 5spd,MTX, Black