Have looked long & hard for this answer guys.Cant seem to find a definitive answer.Im paranoid about firing the old girl up, and the chains foul on primary case. Ok Please see picture.Without those two shims, the inner primary, doesnt sit nicely.With them it does.I presume Ive got that right.Pic 1. So inner primary installed,I then fit spacer(with recess inboard). Do I require any shims next to spacer? If not how do I assure that chains do not foul inner primary case? Pic 2. I have two shims next to spacer on stator/engine shaft.