The good parts first: iPhone SE’s cameras, SIM tray, Taptic Engine, and display assembly (including the microphone and proximity sensor) are all swappable with iPhone 8 parts. And that screen should be cheaper to replace than any new iPhone we’ve seen in years.
The site warns that swapping the display will result in a loss of True Tone unless you have access to a screen programmer. As usual, the Home buttons are not interchangeable and even if you replace your battery with another genuine battery, Apple will trigger a “not a genuine Apple battery” service warning.
iFixit's full teardown is in progress and should be posted tomorrow. Please download the iClarified app or follow iClarified on Twitter, Facebook, YouTube, and RSS for updates.