The key difference is the cap. The "H" denotes horizontal ( side entry ) exit holes for the HT leads. DXH6A was used for Bristol-engined AC Ace and Acecas. The cap part number is 407279. The DXH6A distributor part number for the AC cars is 40551 , which will be on the distributor body, as should be "WG-16". The part numbers determine the advance - in this case it is ECM curve 641 using spring set 424216. This is different from the other 2 litre distributors, but I don't know the actual curve, sorry. The Distributor Doctor should be able to supply the springs if you need new ones.
|