Well I can report that since I did that conversion in 2009 but with only 9k miles since then, the original points are still in there. Only 9k but 5 years with no adjustments or fiddling. What I see that may kill them is the oil that makes it's way in there. (which may be good for the rubbing block and advance unit).
Drill ya an 1/8th inch hole in the bottom of the cap to let that oil out and not build up... - Mike