Zzdp

There are many high quality oils on the market with the correct blend for our older cars. Here are a few brands for comparison purposes.

All of these have around 1400ppm of Zn (Zinc) and 1200ppm of P (phosphate) = plenty for our cars.

Royal purple HPS
Valvoline VR1 - my favorite blend, and one I have used for 12 years.
Lucas Hot Rod and Classic Oil
Brad Penn
Amsoil A-rod
Mobile 1 synthetic - lowest of the bunch

Just so you know.