Yea I was looking at my mounts and theyre only spot welded on, I spose you could probably just cut them out and re weld them to where they need to be. Ill probably have a go at doing that or else just bolt the gearbox through the floor with some thick plates.
For the gearlever hole I think you can probably just cut the original one out, then cut out a piece of metal the same size from further down the tunnel swap the pieces round and weld them into place. Doing it this way, you still use the original gear lever hole which has the nice lip on it for attatching the gearstick covers (cant think of their proper name )
And driveshafts, I've also heard that the shaft from an auto escort will fit, but im not 100% sure, I think these are still two piece, dunno if you can get single piece ones of these or not. But why not use a two piece anyway? im gonna try and find out some more info because im going to be doing the 2L, five speed conversion very soon. If anyone else can add to this or help out some more it'd be cool.