Hello Jack,
Am I hijacking the thread?
You have a valid point. Perhaps more research would shed light on this. The 117 would appear to be a pump with more stampings and simplified production techniques(less castings and machinings)sp. It may just be from my own personal experience that I draw this conclusion and this may be a regional bias(southern US)...I have found one 17 for every 10 117s. One would have to get the actual production figures to know this. You have more data than anyone...
Dave

Dave Jones
It's All Just Stuff