Advance Auto Parts has a Fan Clutch Wrench set that are loaners. I replace the thermostat today on my automatic 330 ZHP vert. The fan nut was not that tight. Please remember it is a left hand thread. The car was showing service engine soon light. Code P00128. Advance turned of the SES light when I returned the wrenches.
Temperature comes up really fast. Head center on the guage. NAPA sell a German made thermostat for $ 49.99 on line and I paid $ 52.00 in the store.
Thanks for the DIY it really helped.