Octane additives?

In the ‘80’s, I ran a SCCA MGB with supposedly 12:1 compression. With my beer budget, I ran Moroso octane boost. It pinged a little but served the purpose.
I got a chance to buy Union76 race gas at Laguna Seca, and OMG! What a difference!! Never opened the Moroso can again. Sucked it up and bought race fuel after that. My two cents.