Glad I could help Dave.

Just to add on to the above I have just remembered that at the same time the fuel feed pipe from the fuelock to the converter (Pigtail pipe) was also changed in length.

The change in pipe length was to reduce the amount of LPG that could be in the lines and possibly force its way into the cylinders (If I remember correctly) and this also meant that the units had to be moved closer together....so you may have seen this change as well.