My TR3 came with an MC that was not the stock TR3 MC. It is either a 62-80 Spitfire Clutch MC or a TR4 MC? Is there anyway to tell which one is which in order to get a rebuild kit? These MC's have their own reservoirs unlike the the original 3's that have the combined brake and clutch reservoir. (Looks like a previous owner had brazed up the "clutch outlet hole" on the combined reservoir. Been driving the car for 20 years with this set up without issue so would like to keep it rather than go back to the stock set up.