Sounds like a smart move to change the 30 year old plastic bits!

So I think we're talking about replacing (a) one curved rail that the tensioner presses against to tension the chain and (b) three straight guides (one passenger side, two driver's side). Is that right?

Question: are the three straight guides identical? Looking at the Pelican site I see only one kind of upper (in the head) guide.

__________________
1988 420SEL