Timing marks location

Take a look at the images attached. The timing on that engine isn't difficult even without marks. Bring number one cylinder up to top dead center, then align the pin in the cam with the mark at the top center in the cylinder head (or so the pin it centered on the top) then install the cam sprocket and hold it in place while you tighten the bolt. Next install the belt and tighten the idler down enough that the belt cannot slip, rotate the engine clockwise 2 revolutions and then check that it came back to the same marks. If it did then check the belt tension and torque the idler down to 31 ft pounds. Then proceed from there.
If you have no marks the cam pin and crankshaft key are both at the 12 o'clock position for alignment.