out of curiosity what does dtm stand for
DTM is/was a touring car championship......and I used to own a white special edition Calibra Turbo DTM...
When I first registered here I went for a name of simply Mark....but Marks DTM Calib seems to be well knwon from some other sites so I was asked to change it.
As for the head and manifold, your welcome.
I trust its all running an sorted now. 
Hi Mark,yes spot on thanks,the timing was slightly out before i removed the belt,but spot on now.The garage we used for our Omega's belt changes is something to be desired,i asked them to use/hire their cam locking tool to be told they don't have one!,asked the question then of how they did it and he said they must of hired one so again i asked where from,but he couldn't remember!!...need to check mine asap...Wayne