Here in Brazil we have high temperatures on summer, too.
But remember, the 68060 is not a known heater. There is other chips on boards who heats much more: Amber, CIAs, the PPC CPU, Agnus (Alice in 1200/4k).
A simple heatsink in the 060 can keep it cool enough. Pick one from a Northbrige from a dead peecee mobo.:eureka:
