I've started on a V8 swap a few times, but never finished. The last time I stopped on it was when I realized that my engine cradle held the engine too high for the gear shift cables to reach. Be sure to consider all the details like that as you go forward. I'm looking forward to seeing your progress!
Here's a link to one that was swapped a few years ago with an AYS engine from an S8 that has a lot of good documentation. It may be helpful if you haven't already found it.
https://sites.google.com/view/boxsterv8swap/home