Anyone using other than stock spark plugs in their early 'S'? The stock recommendation is a W3DPO, but my car currently has W5DC plugs in it (recommended for a 'T'). I haven't had any problems with detonation using the hotter plugs from the 'T', so I'm concerned with going to the cooler plug recommended for my car.

I'm also considering using one on the alternate electrode design plugs; specifically the Bosch 3 electrode plug (W5DTC). I'm currently using a set of W7DTC plugs in my 914 and they made a difference in the idle quality and throttle response.

Anyone have experience with different plugs in an early 'S'?