Oops I meant to write C10129 & C9106 not C10135 & C9176 .These are the Alvis part nos for TE/TD heads ,the former means bigger valves ,more power etc ,all good which is presumabley why the TE has a different dizzy .I suggest you find a copy of the " Catalogue of Spare parts " for TD S11 & TE21, ebay usually has one or RT, it is a mine of info with all variants detailed/numbered including exploded drawings of the whole car down to the last split pin.All the bigger parts have a C no.stamped on them somewhere.The Alvis part no for a TE distributor is C10273 and the TD is C9401 Posted by Peter Martin 25/09/2012 08:50:57