Morris Minor Owners Club

Well - that shell is badly worn - hard to tell about the crank, it's certainly not deeply scored although there are some marks - can you feel any ridge at the black line - if you scrape your finger nail across ? How about a big-end bearing picture(s) - they are often more 'telling'!
While in/about the engine - better whip the oil filter casing off - and see if the plate and spring are still there - under the paper cartridge! The wear on that shell suggests the oil may not be getting filtered. If you do take the engine out - you should also fit a new oil pump.

You have a lot less sludge in your engine than I had.
Could be that yours used better quality oil or did fewer short journeys.
The surface of your shells look a little less coppery than mine, maybe there are still some traces of lead.
For comparison:<br><br><br><br>

Well worth making sure the oil is getting filtered as Roy says.

Ive made a decision,im gonna replace the crank and be done with it.just incase the big ends go an wreck the engine.
apart from the oil pump should I replace anything else while im at it.

Timing chain, clutch plate and carbon thrust spring to mind.