I normally get my paperwork out to refer to when I do this but off the top of my head this is what your looking to do.
There is a formula you use (look it up on the net) but its something like add the opening point to the closing point of the cam together then add 180degrees divided by 2 that will give you the full lift at what point on the crank pully. Then you turn the crank to that figure and then turn the cam to set the full lift point.
You have to take a "best of" figure on a single cam engine as you can't change the overlap like you can on a twin cam.
If I'm wrong someone will be along shortly to correct me