oil for flat tappet
 

I have a 68 with a flat tappet cam. Can I use a bottle of ZDDP, which I have, to regular Valvoline conventional oil and be safe about wear? Thanks

probably so follow the mixing amounts.

If you want to be safer https://www.maximausa.com/product/performance/
Ive used this oil for a few years with good success. I run a roller cam but still use it. I used Valvoline VR1 Racing oil before this and when I had my flat tappet setup. A local engine builder recommend the Maxima so I switched to that.