On my 83 300d there is a relay on the passenger fender for bumping starter. Makes the job easier. Then fine tune with p/s bolt to bring the lob to the top. Keep track of valves adjusted by marking head with chalk or felt tip pin. It also helps to have diagram of valve layout, intakes and exhausts so you don't get confused. Also I believe you hold the top nut firm when get the proper lash then tighten bottom nut then recheck lash. They are kind of touchy. You will see what I mean. But a little loose is better than a little tight, as they will tighten on there own with mileage.