The cam sprockets have up arrows point them up and 2 lines on the front outer edge of the sprocket the lines you mate up with the head valve cover gasket surface. One mark on the block and one on the crank sprocket. You also have a balancer belt??? If you want I can pull this info kind of hard to explain but the back balancer is geared so it can go 3 ways and look fine but it is off in 2 of the 3 ways.