Phosphorous (ZDDP) has not been "eliminated" in modern oils. <CLICK> It has been reduced but there's an adequate level for older stock engines. Unless you're running a high lift cam and/or strong valve springs you're just fine using modern oil in your older engine.

Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.