Lol I thought the how 2 was pretty clear, no bias here of course All GT seats are the same as far as I know, MK3 seatbelt clippy bits work on EP91 belts, however MK2 don't and I assume MK1 wouldn't either Secondly, I assume the rails are the same (can't see why they would change them, so they will need the same work). It's not much honestly, just grinding a few bits. If anyone reading this is wanting some, I'll be selling some out of a MK3 GT soon so gimme a shout!