This is how it is with the flywheel locked off:
I know the crank pulley's can slip due to the rubber bush - I'm actually waiting for an alloy pulley to turn up - lost in the postal strike I think
But I'm pretty sure it was fine before I rebuilt the engine - I even tried another one as I had spare one lying about, the rubber looked in even better condition than the one in the photo and it was still out by the same - roughly 90 degree's.
I've had the flywheel off and and spun the engine round many times again - but sill the same....