Newbe 300D timing Chain replacement overview needed
 

Hi gang!
This is my first exposure to the list. I am faced with replacing the timing chain on my '81 300D, 207K miles, now at 6 degrees of stretch. Searching around I found bits and pieces to the chain replacement procedures.
My concern, given the various guides, tensioner, rails and chain that are interlinked, what is normally replaced to do a proper chain replacement? Should for example the tensioner be automatically replaced or inspected and reused if good? Should all the rails be changed? Who would have the best prices for the parts? What are the necessary tools? What are the got you? Are there any good diesel chain replacement write-ups? Thanks in advance,

Ted Lucas
'81 300D, 207K, miles
'87 300D, 190K, miles