Here is a photo of the spindle sticking out further on the non drive side, is this correct, I tend to think not, but will be happy to be proved wrong!
There's no firm rule on symmetry of bottom bracket axles. Many cranks are designed to use a spindle with greater overhang on the drive side; many use a symmetrical spindle; a few use a longer non-drive side. Your Chorus cranks should have been fitted to a 111mm symmetrical ISO-tapered spindle.
The asymmetry of your bottom bracket may
be due to fitting a unit intended for a 73mm shell in a 68mm frame, pushing the whole unit leftwards. A 73mm unit will have "73" stamped on the drive-side flange. It's not straightforward to fit a cartridge BB backwards in a BSC-threaded frame (which, presumably, your Rourke is): the drive-side cup has a left-hand thread.
Be prepared to replace the bottom bracket no matter what cranks you decide to use. Cranks and axle need to match. Shimano 600 cranks typically require a 113mm bottom bracket axle.
Calmes dans le demi-jour
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De ce silence profond.