Welcome to the forum. For answers to your questions, check out these threads:
https://986forum.com/forums/show-tell-gallery/54328-boxsterls376-introduction-ls3-conversion.html
V8 Conversion
I'm pretty sure they have enough detail somewhere in there and you may be able to contact both of the authors.
JJ has been back on the forum recently.
I think Vlad moved on to a 996 and some other stuff before finishing up his swap, but I think he still posts here from time to time.