valve seats

[ZCCOR#109]

Here is my question.

After many years of no lead, what is the consensus now on the need to use a lead substiture in the fuel for my 72 original engine?

Was all the scare about needing lead for seat lubrication correct?

I did an additive for a number of years but have gotten away from it lately.

Any hard facts? experiences?

What say you? AND why.