Can use some Thermostat and Rad Cap advice

Yeah 13 pound cap is perfect. Guys sometimes think more is better. It's the other way around. The lowest PSI you can make the cooling system run and not puke is best. Pressure is bad on the cooling system. I think the 180 thermostat would work well here. But get a high flow one. I actually like the Edelbrock thermostats. They're made outta stainless steel and most parts stores have them or can get them in a day.