Hello, although the request is 11 mese ago and if the need for the manual is still, what I can comment is that it is very scarce, but there is an alternative, lower the Seat Panda or Marbella manual.
Regarding motor are all the same engines with a distribution chain in versions 850-903 and 1000 cc, the change boxes the same matter, except that the terra manufactured by the vag group brings small variations in the change selector mechanism (the reverse particularly) and its ignition system is of the static type or with a crankshaft position sensor, hence the deletion of the distributor.
To assemble and disassemble the box there is a different procedure with respect to the crazy axis of reverse, but the post would be greatly lengthened.
I hope I have helped although late !!