Yes, the 16v engine is a sraight fit. The conversion would be the same as in a Sud or 33 but with much more room to work in the engine bay. The front end is all one GRP moulding and comes off for mechanical work easily.
I use my (16v powered) Minari RS for a couple trackdays each year. It holds it's own with most everyday stuff. My best time around the Nurburgring is 9 mins 22 seconds. Not super quick like a Nissan GTR but it is decent enough (and 40 seconds faster than Clarkson managed in a big engined Jag!).
Minaris aren't perfect but they are a lot of fun!