We had a website about three years ago that converted very well and, over the years, things evolved. Now it's totally different in terms of databases, design; everything.

We'd like to do a experiment and send a small amount of traffic back to that original website to see how it performs in 2015. Is there any way to do that, on the same domain?

Essentially, rather than split test page elements, we'd like to split test two totally different versions (both in design and coding) of the same time.

I've got no idea!

Thanks in advance,
J.