I can tell you from experience, if your system cools properly you do NOT want a 160 stat. As a matter of fact you may not want some companies 180 stats.
Here's my experience; new years eve day, coming back from family party alone, around midnight. Car is running so cold it did exactly what some else said, Condensation in the pistons. Thank god I got it home. I see you live in my general area so you know all about extreme heat to freezing cold weather.
I switched to a 180 Holley stat and it still ran too cold. I think it opened too early and never even reached 180 degrees. I switched over to a 195 super stat and it doesn't go past 200. I figure if GM PUTS 195s in there then it works for me.
Of course, you didn't tell us what kind of engine you are running. That sometimes dictates which stat too.
Btw, if you need any thermostats, let me know. I have 160,180 and 195 Holley stats, all with less then 200 miles on them.
327 .030 over, Z28 intake, (measured, actual) 11.5:1, .032 quench, , 20 initial, 18 cent all in @ 2200, 12 vac advance, 750 DP, headers into low restriction mufflers, 205 cc angle plug aluminum, 250/250 .605/.610 110 LSA, 3/4 filled block, stacked plate oil cooler, 405 RWHP @ 6500 RPM. 160 stat, temp sender in intake manifold.
With reduced heat load on stock radiator, cooling system easily keeps temps at stat rated temperature, in ANY ambient condition. Oil temps are about 150-160 as well, in fall temps and about 10-20 degrees higher in summer temps.