Finally, my first 360 and goals for it! I'll be asking a lot of questions.

Honestly, if I read the numbers correctly, your not even a half thousands off on the bore for taper? In my opinion, that would be "factory perfect", which we know mass production is never perfect. But I honestly think that your ok for what you are trying to do. Just my opinion.
Yellowrose is a machinist, and he'd strike for perfection, which is best. But I don't think you'd have an issue at all for what your trying to do.