find out what the warrenty is and get 180 be best i think for u

 

Thanks again man!

 

Normal operating temperature for your 305 without A/C is between 180/220 deg's.

Since you stated it is a 1982 model. my opinion would be it is time to upgrade the cooling system. Start by replacing and checking the following:
1) radiator
2) hoses
3) thermostat 180 deg
4) new coolant mix
5) check your water pump & belt
6) check the electric fan
7) make sure you have a air dam under the car ( Major part of the cooling system).

Outside of a major engine problem (leaking head gasket) you should run about 180 in traffic

 

most people would kill for temps that range. mostly these cars ran 240-260 from the factory to meet emissions requirements. that is their acceptable factory operating temps, which are rediculous. 160 is too cold though for a street driven car as the oil and rings will not get hot enough. 180-200 is right about where you would want it

 

this is a rebuilt not original 305. the hoses, coolant,water pump is new but the radiator is older, thermostat is 160 and part of the dam is missing, and the fan is a stock clutch fan

 

replace that dame that is ur main source for air flow when ur driving the air hits that dam and hits ur radiator if some is missing ur loosing air flow and lose of cooling

 

I'll do that, thanks

 

i bought a 180 thermostat today and i'll get an air dam also to help remedy some things