What oil for solid lifters?

I read a really great article "Trouble in Oil City" about why Diesel oil is Great for solid lifters. I am running Valvoline Delo 400 15W-40. I plan to switch to Shell Rotella-T 15w-40 after initial break in. My engine is a 67 273 4b with solid adjustable valve-train.

Do some research, as was said ZINC!!!!