hey guys wanted to pick people brains before i go ahead with plans, building a turbo a series and wanted to put a auto behind it, does the auto from the sedans wagons etc fit or does the tunnel have to be modified,or any other autos fit, suggestions would be good also,obviously am going to manualize valve body, extra cluct packs etc, just wanted to know what to use, any of you dato gurus can help would be great.

auto tunnel is bigger, and has all the mounting points for the shifter mechanism.
Best to find a sedan with one, and borrow the lot, including the tunnel.

It's not an easy conversion. Only Auto to Manual is easy.