Vehicle: 86 420SEL, 90,000 miles

Well folks I am knee deep in the process of replacing the timing chain. The plan is to replace chain, tensioner and guide rails, cam oiler kit.

It appears I have no visible chain stretch. Timing marks all line up. The question I have is do I need to replace the chain and tensioner? Should I leave it alone and just replace the guides? Any thought?

Thanks,

Joe