As my Timing Chains are due am trying to find what the best option is. Found these on eBay:
Item 290435470199 (don't know how to paste the link..sorry)

Would appreciate your thoughts.

 

Here some more info about the primary guides:
https://www.jaguarforums.com/forum/x...sioners-69916/

Personally I would go for the Original guides, and not the modified 3rd generation ones (where they removed the bulge), as I have obviously my doubts as they are weakened by then mod.