"Probably the most complicated job on a P.11 is putting the engine/gearbox unit back into the frame and assembling the eleven spacers in the correct position. If this is not exactly right, the engine will be out of line and the rear chain will foul. Also the prop-stand bracket will not abut against the left hand engine plate and will swing round, causing the machine to fall. "
Citation from Paul Morin's writeup on the P11.
I believe your 3rd+4th picture shows the correct position. Have you read the other thread on P11 sidestands?
I am wanting to replace my home made side stand on my 1967 P11 with an original side stand. As I browse thru the threads on this subject I don't find much info that seems valuable for my needs. I have the parts book "Spare parts catalog 1963 through 1970". The first two sections, of the three in...
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-Knut