i have 2 manual motors, both appear to be early (series 1) one has 6 bolts, the other 8.
apart from casting numbers, the only difference i can see between them is the injector rail.one has the FPR mounted onto the end (*8 bolt), the other on top (*6 bolt,later ??)
i was of the impression the earliest version had a different crank between auto and manual, but S2 onwards were the same with a 6 bolt crank??