If they're water jacketed headers, and it appears that is what your looking at, no real problems. Plumbing them is always an issue, not a problem for you, and they do run hotter (to the touch, not to the engine) so make sure they're clear of everything, hatch, seats, engine cover, potential mates, etc. AND that your bilge blower is working!
Perfect addition, and really required when droppin in a blown engine!
Now the intake side of that...........
Ray