I have the engine, but it's going in the tuesday after Inters. From what I've read online about the 20vT swaps the engine mounts are all the same apart from 1 that you'll need of a mk2 engine mount for one of the back ones. I'll try and find out which.
Mine's a Audi TT lump so obviously (unless I have a secret rallye/syncro project going on) I won't be able to use the TT's box so we're using a mk4 20vT one.
Strengthing isn't needed as far as I know. I'm going to invest in some strut mounts to tighten up the cornering though. they look cool too

Take lots of pics if you're doing this yourself.

good luck