I had the same problem with my quicktime bell to. I made a bracket very simular to yours but I went with 4 bolts, 2 on top 2 on bottom, the ear on the bell for the starter would flex and bind the clutch linkage, I also welded a brase from the ear back to the bell to stop the flexing and I had to make a 3/8 spacer to put under the clutch fork bracket to get the right through with my early A fork bracket.
