Dipstick will go back in, but it was a pain... lots of twisting, wiggling and jiggling... sorta like Britney Spears I guess... but I did get it back in.
I did damage the o-ring on the end of the dipstick and I had to replace it.
The EGR can be painful too... If you disconnect it from the top, then hook it up to the header, then reconnect it to the top you should be okay. That's what I had to do. Otherwise, I couldn't get the dang threads started.