Here is another thing you can do & I have done this a few times.....
There is a slot in the dist body that locates the cap. You can file/make a new slot at 90*, 180* or 270*. Whichever position:
[1] locates the dist body where the VA unit can be accessed for adjustment
[2] locates the cap for clearance from other parts. You will need to lengthen the red, yw & black wires.
I like your thinking, of reindexing dist. cap, I'm 1st wanna exhaust the possibility of incrementing the pump drive gear which should have yielded a 20* change about less than 1/2 the rotation distance of the rotation cap tower to cap tower.