Thanks again. I was wiggling hard on those wires and I pulled on them by the boot. I bought a pair of plug wire pliers, but it's difficult to find space to use them along the firewall.
I will try FriboRage's idea of pushing the steel boot cover down as I pull the boot to allow more boot to grab. Maybe some silicone spray could find a way down between the boot and steel cover too. I'll try FriboRage's advice before I tilt the engine. Our car doesn't have a supercharger or headers. It's pretty much my wife's grocery getter.
I changed the plugs on my '65 GTO in about a half hour a month ago. Cars aren't as easy to work on like they used to be.
