Hi, Does anyone know if the TRs 3-6 had an alloy diff cover as standard? There's one on eBay http://www.ebay.co.uk/itm/Triumph-TR2-TR3-TR4-TR5-TR6-alloy-differential-cover-/291039873532?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item43c35409fc Seems rather pricey. Are there any significant gains to be made if it is not a standard (no pun intended) fitting? Regards, Chris