I don't think there is a dist cam with a 11* slot-do you have a part number off it???
Over the years I have welded up the slots on many stockers and then with porting tools ground out the length to what I wanted-back in the days of the big truck engines the short slots were easy to get---some of those concrete delivery, garbage trucks, etc that you are passing going down the road had a few of the best parts out there-short ignitions, long stroke cranks and rods---