DIY T Stat Install
You can get the T Stat at most auto parts store for under $15.
170 degree - part # 4127 (Motorad # 302-170)
180 degree - part # 4128 (Motorad # 302-180)
Note - if you change the Motorad part number to 7302-1xx you will get the Failsafe version... IE - will stay open in case of a failure.Change the part # to 2000-1xx and you get the Hi Flow version.
But, to make this mod work correctly you will need a $300 Diablo Sport Predator tuner to change the fan temps.
I used a 13 mm socket on 3/8 ratchet with a long extension to remove the T Stat bolts.
Do this mod when the engine is cold and make sure the radiator pressure cap is on tight.
Now pull the engine cover off and tape a 1 qt baggy under the T Stat. Next remove the top bolt, followed by the bottom bolt. You will get maybe 1/2 pint of coolant when you do this.
Next remove the T Stat. You will get pint or more coolant when you doe this. Be aware the T Stat "O" my stay in the housing. Besure to remove it as there should be a new one on the replacement T Stat. If there isn't just install the old one on the new T Stat.
Install the new T Stat with the air bleed hole to the top.
Reinstall the T Stat bolts and tighten.
Return the coolant collected in the baggy to the overflow container. Start the engine and check for leaks.