As you can see. I have space above header 3, I want it to be inline with the image itself.
HTML
If you set both elements to inline-block they will set side but side and you have more control than when floating the item - just remember to remove any white space between tags.. Just change the top margin to 0, and you don't need any unit when the value is 0.
.content > img, .content > h3 { display: inline-block; margin-top: 0; vertical-align: top;}