Best t-stat for power

I e been told by a few different people that if I switched to a 180 degree thermostat from the 195 degree thermostat I'm running right now I'd gain a little more power.
Is there any truth to this?
I've got a 300hp crate 360 magnum, running the dual plane mopar m1 intake and a quick fuel super street series 680cfm vacuum secondary carb.
I'm running a Napa premium 195 degree thermostat right now. I don't have any over heating issues, she always runs at 190 to 195.
I've got a 3 row brass/copper radiator, a 8 blade water pump and a fan shroud with the mopar performance 5 blade viscous fan, no fan clutch.