Iframe help

Hello, I have two wordpress blogs site A and B, I would like to have site B in iframe. And what I am trying to do is site A that goes to site B keep it’s header and site B, do not show header, or hide it in iframe. Can this be done?

I want to put my other blog in iframe on my main site, but I don’t want to show my other blog header in my main blog site.

what??