Here is what I would do.
Get a new T-stat (10-15 bucks), a new t-stat gasket (under 5 bucks), the 2 intake manifold gaskets (50) and pick up a black rtv silicone too.
put the gaskets down onto the heads, and put a little silicone under them, right around the coolant ports front and rear. And put a little on top of them front and rear too. That way it will seal to the head better and to the manifold better.
Good luck! And then ofcourse new coolant 50/50
Get a new T-stat (10-15 bucks), a new t-stat gasket (under 5 bucks), the 2 intake manifold gaskets (50) and pick up a black rtv silicone too.
put the gaskets down onto the heads, and put a little silicone under them, right around the coolant ports front and rear. And put a little on top of them front and rear too. That way it will seal to the head better and to the manifold better.
Good luck! And then ofcourse new coolant 50/50