Stewart Componets- Hi-Flow unpolished $69, polished $89.
The thing with the thermo is that with a 180 in and YOUR radiator the temp still rose. This means that your radiator isn't efficent enough to cool the water thus the thermo is open all the time and the water is never in the radiator long enough to cool down, the 160 is just masking the problem, but it runs cool so your happy and I understand that.
The Stweart pump also evenly distrubtues the water to both heads which is important when running alum heads, can't get those too hot or the'll warp. How was the engine cool? What temp does the fan come on, if you get a fan controller (Advanced Auto has one for $20) you can have it come on earlier at a lower temp this might prevent it heating up too quickly as well.
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Check Out My Site 91GT,Holley SysteMAX II Kit-Heads 2.02" x 1.60" port matched to a 1262,Anderson N-61,24#,76mm C&L,Full MAC exhaust 1-5/8" Long tubes,2-1/2" O.R H-Pipe,2 1/2" cat back, No A/C or PS or emissions, 12" K&N Filter,RNH PERFORMANCE Ram Air,Ron Davis Radiator,Full Suspension,S&W 8pt "X" brace,JAZ seats,3:73's,Welds..etc,4:30's and 31 splines coming very soon!
FIRST TIME OUT 12.16@111 WHEELS-UP