On these cars they are.

Only thing you should be worried about keeping are the metal boot covers.

And honestly, I don't even have those, just route your plug wires intelligently and you won't have any issues melting/burning wires and/or misfires.

I run Autolite 606 plugs gapped at .050"...with MSD wires...they have bendable plug boots so I can turn them away from the manifold primary on each cylinder. Easy peasy.