[ZeGermanHam]

Originally Posted by dataway

What is the preferred coolant these days for a vintage Pontiac? Is there something that helps protect the aluminum timing covered compared to the old products that didn't do that great of a job?

Like me, I'm sure most here use "regular" off the shelf coolant that is safe for engines that have aluminum components. You can also add an anode like so: https://www.rotometals.com/flex-a-li...4-npt-x-1-3-4/.