<p>I think you have a good shot. But I would recommend that you go for the Phd for 2 reasons.</p>
<p>1) MA in history is really neither here nor there, especially for a career in academia
2) Phd is free and it is funded by the university
3) As a Phd student, you will also get paid a stipend for teaching</p>
<p>You have a strong GPA, I would suggest you shoot for Cal or better universities. A MA in history from Cal Poly is not going cut it for you professionally.</p>