Replacing Timing chain, A couple of Questions.

[RadioTek]

Rolled in a new chain yesterday, followed the procedure at Mercedeswiki about the 3 pairs vice-grips. Everything went pretty smooth if you don't count the loss of one Oh Jeezus clip (E-clip for Chain master link) just a trip to NAPA for a replacement.

Now I have a couple of questions

1) What is the torque for the valve cover bolts? I know it's a rather low value to keep from warping the cover or stripping out the bolt hole.

2) When I started the process, I figured that I had about 16 to 18 degrees of chain stretch. I figured this by lining up the alignment marks on the cam and reading the difference from TDC on the harmonic balancer. After I got the chain replaced and in, I still have about 15 degrees of difference from TDC at the balancer, with both of the cams lined up perfectly.

Will this be taken care of when I fire it up by the chain tensioner? Or am I going to have to look for another cause? There are some of the typical notches in the heads from the old chain, and there were some light scratches on the inside of the Drivers' side valve cover from the chain.
Both cams line up perfectly with the new chain, but I have that 15 degree difference.

Thanks in Advance,
Scott