Everything is essentially the same except you'll need the crank trigger kit and for easibility, the 3400 Upper intake manifold should be reused...no need for any extra wiring.. The swap is almost a bolt on IIRC. Doing this swap alone without mods will increase horsepower because of minor design changes they made to the engine to increase air flow... It may run a little rough and will need a proper tune as well to get the best out of the engine.
Also read this:
http://dl.dropbox.com/u/534555/3500%...dy%20Swap.docx