My first (and only) four wheel vehicle plug change was on my grand prix. It was some work but nothing to complain about; likely just a lot more challenging than other cars.

I folded up a couple towels and set them on the dogbones and just kneeled on top of the engine while working. I didn't move the engine and got it done just fine.

I would recommend removing the plug wires then blasting each plug with air to remove built up crud and prevent it from falling into the engine. It probably wouldn't hurt to break them loose and blast them again with air.