Is this a 5 minute job of does it involve stripping the engine down?

it is a 5 minute job and no you dont have to strip the engine down . Just follow the four spark plug leads to the plug do one at a time so you dont mix the leads up remove lead by pulling it off the plug remove plug with proper size sparkplug spanner or socket put new plug in but check the gap is correct usally you can get this from any shop that sells the plugs some are preset tighten to reasonable tightness put lead on and do the same with the rest. hope this helps ..