I got a good deal on a 2001 4.0 s-type engine. The problem is it needs a new timing chain guide rail and timing chain. Would this be an easy task to take on since the engine is already out? How much labor would be involved to replace?

No bent valves or anything and the engine has 88k on it. Should I go for it? Or just keep looking?

 

Several excellent posts at the top of the XK8/R forum as 'FAQ sticky's'

Look alphabetically under 'tensioners'. The .pdf download is about the best you will ever see.