I think if you are running an aluminum rad than you can use a 180 stat. Might need more cfm from fans. what type of water pump are you running. If you are running and E intake make sure the holes on the water cross over that bolts to the head are gasket size. I have a 4 gen fans 160 stat 4 core brass copper rad aluminum w/p divider cleareanced holes opened on the intake and my 406 runs 180 degrees. So I think yous will run cool too.
Conrad 79 Trans Am 400 auto Crower 60210 Torker II Holley 750 vac sec. #12 heads,3500 stall.
It needs to get warm enough to evaperate moisture out of the valve covers and crankcase. No thermostat or un-restricted systems wont alow the radiator sufficient time to do its job as a heat exchanger.
Bull Nose Formula/ 461/ Q-Jet/ TH400/ 3.08 8.5 / R44TS.