Each cam sprocket has a small triangle stamped on the front between two of the holes. The rear metal cover has two tiny indentations at the top. They are not quite straight up, rather, they are about one tooth closer to each other. Line the triangles up with those notches in the cover.
The crank sprocket has a dot stamped next to one of the teeth. Line that up with the finger protruding from the oil pump housing at about the 1: 00 position. All of the slack should be taken up on the rear side by the spring-loaded tensioner pulley. Rotate the crankshaft two complete revolutions, double-check the timing marks, then pry the tensioner pulley tighter with a pry bar, then release the pry bar and tighten the bolt. Sometimes the pulley hangs up and the spring doesn't pull it tight enough. That can lead to overheating from the belt slipping over the water pump.