is it possible to due this with minimal modifications?

I have seen a few people do this before, and it looks good. However you will have a difficult time making others believe it is a 240Z at first glance. Of course the other telltale signs will be there, but a 240Z looks best IMHO with 240Z taillights.

If you want to do this, you will need to get th lights, the rear covers, and do so minot wiring modification. You will probably need to modify the back plate the lights screw into as well.

The bottom line with any modification is this. Don't listen to me or anyone else. If you like it and you think our Z will look better then go for it. It is, after all; your Z.

Yep, think it's a great idea.

And if anybody in Australia wants to do the swap I'll happily trade my 260Z tailights for some 240Z ones (I reckon the 240Z ones look better)