Golf Mk1 Vr6 has been done and some with turbos.
I had a Mk2 2.9 Vr6 with six speed g/box back in the late 90s.
Brought Mk3 Golf Vr6 a couple of years ago with intention to tinker about with but now into m/bikes, so thats taken a back burner.
Impressed with the o/p self build.