[Boxy_02]

Originally Posted by 78F350

The engine itself, does not need to be an automatic. There are some peripheral items that you can swap, such as the wiring harness and the plumbing. Some minor vacuum hose changes. Flywheel will need to be from (or new for) a 3.2 automatic

There are other considerations regarding year for the sensors, DME/ECU, throttle, etc.

Read this yet?
Porsche Boxster Engine Conversion Project - 986 / 987 (1997-08) - Pelican Parts Technical Article

Buy the 101 projects book to get started.

Yes! I did pick up the book, just didn't get the chance to go thru it yet.