i'm pretty sure they all had a cable change gearbox, which is smoother. the g60 is essentially a pb engine digifant with a few tweaks to get it to run a supercharger. so are straightforward to put in. the only thing which might make things tricky is if the engine comes from a corrado the ecu is on the right hand side whereas its on the left on a golf which i think can make the wiring a bit of a nuisance to get installed neatly.