cool57 Posted May 2, 2016 Share Posted May 2, 2016 (edited) I looked on O'Reilly's website and found at least three choices for 63 425. Murray temp control plus, Temp control Ultra (larger than OEM opening) and Moto-Rad Fail Safe. I plan to run 180* Suggestions? I tried a search but results were for the entire AACA site. I couldn't figure out how to narrow it down to Nailhead/Riviera. P.S. Car currently has a 15# cap, is that correct or should it be 16#....? Edited May 2, 2016 by cool57 addition (see edit history) Link to comment Share on other sites More sharing options...
Jim Cannon Posted May 4, 2016 Share Posted May 4, 2016 I recommend the Fail-Safe 180 degree thermostat. If you ever overheat due to the thermostat sticking shut, it has a secondary mechanism that locks the piston open. Then the coolant flows again and you don't wreck the engine. A 15# cap is plenty. 1 Link to comment Share on other sites More sharing options...
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