That's a nice looking Aries ....... wait, did I just say that?

Anyway, I wish you were closer so I could hang out under the hood (my daily ride is an '86 Daytona Turbo Z C/S). I've kind of gotten used to working in the cramped quarters of the k-car style Dodges.

After changing the t-stat you need to burp the system. If your head doesn't have a burp plug behind the stat (some didn't) or is stuck (most are), then I would recommend pulling the t-stat back out, drilling a 1/16-1/8 hole in it, and putting it back in.

The cooling systems in these cars are 1) not simple, and 2) fail often. Make sure the fan is kicking on (if not, there is a fan relay).

If it isn't spitting fluid to the outside, make sure the fluids aren't mixing up on the inside. The heater cores and radiators plug often. I would be more willing to change a head gasket than a heater core. Half the interior has to come out of the car to change the heater core. But you live in Florida, so just bypass the heater core.

Hope this helps.