Im in the middle of doing a head gasket, i sent the head out for a valve job.. Now i read that the marking on the head and the marking on the timing chain sprocket should line up to become TDC,,,, But on the first cylinder the exhaust valve is down about half way..

Also,, how do i know when the engine is TDC?? i would imagine even half a tooth off on the timing chain will cause it to run very poorly or even damage my head.....

Also can the head and engine be adjusted with the head bolted on to the block??

Is there any prinouts someone can send me to properly time both the head and the engine.. i really only have one shot

ANYTHING WILL HELP