OK really it is quite easy.
You will need to source the DE head, dizzy, inlet manifold, exhaust manifold, and timing chain cover (or make small plate). my guess is about $700 for that. The fitment should be fine, just a case of off with the old, on with the new. You may have to get an auto electrician to sort out the plug for the dizzy unless you can source an electrical diagram for the DE... but he only has to change 4 wires.
Timing chain wont be an issue, but I imagine you will have to get DE chain to fit the head
Dont let the stuff scare you, it shouldnt be hard, and you will learn alot! not to mention the extra power.