The old blow hole method!Fortunately you only need to remove the passenger side valve cover. Then turn the crank clockwise while watching the cam lobes and the valve stems. The front cylinder on the passenger side is the #1. Both cam lobes will be up and the valve stems completely up (the valves are closed). You can use a straw etc to make sure the cylinder is at TDC. Then take the distributor cap off (mark it's position first) and see where the rotor is pointing. It should be on the #1 plug.
Another option is to have someone put their finger over the #1 sparkplug hole while you turn the crank by hand. DO NOT TURN THE ENGINE OVER USING THE STARTER MOTOR WITH SOMEONES FINGER OVER THE HOLE! The presure could seriously injure them. You will know you are on the compression stroke when the pressure pushes against their finger (should push their finger off the hole) This means the valves are closed. Find TDC on this stroke and then check the distributor rotor.