I have a user perspective on this. Unless I have misunderstood what you are trying to do, I expect that I would hate to have to use what you are proposing.
Any blog that I find useful will always entice me to follow the trails to other useful material (blog posts or links) and then I will find stuff that I want to share with others. The iFrame solution is only really suitable for small “snippets” that I will never want to navigate from or link to.
I lose too much basic functionality and utility every time a developer has the “great” idea of putting a website in an iFrame. It is usually done for expediency while discounting the impact on the user experience.