In regards to VR1 zinc content I asked Valvoline about it today. I asked:

"Does VR1 that is currently being shipped still have the same zinc content (0.130) as this link indicates: http://www.valvoline.com/products/VR-1 Racing Motor Oil.pdf"

to which they replied:

"The Valvoline VR1 Racing Oil has never changed in the Zinc content. VR1 has always contained 1300 ppm or .130% of Zinc."

So, unless they aren’t telling the truth there is a conventional SM rated oil (VR1) that has 1300 PPM zinc.

I am going to use VR1 in my stock 1970 440HP. Hopefully it continues to run good.