I don't know if it makes a difference, but Africa XJ6 is in Africa. He most likely has a ROW or Euro 4.5L SLC. Are the cam specs for those cars same as those in NA?

By the way, the weak point on the chain systems are the plastic guides. Chain will hardly ever fail, but the guides will and jam the chain.

Another thought - would new sprockets take up that 6deg? Only ask because when I installed new chain on my 72 (metal guides!) I still had some offset. Thinking I perhaps should replace sprockets (160k miles)

__________________
Graham
85 300D,72 350SL, 98 E320, Outback 2.5