I've had my mk 3 for about a year, it's the black metallic with pretty much all the original stuff on it as from new; it's a p reg, 120k on the clock, lowered with decent alloys; tuning wise it coughs and splutters a bit and seems to be holding back from the full power, not being mechanically orientated could this be a simple case of changing the ht leads and spark plugs?
Also, is it worth leaving it as original as possible or would changing it devalue it at all?