You are correct, there are 4. Some people grind them off some drill them. I drilled mine
I just hit them with a center punch and worked my way up with drill bits. The body of the rivets is bigger than you think, they are about 7/16" if I remember correctly
Don't know if this is allowed but would you be willing to sell and ship the steering arms,spindles,and brake setup? Looking to replace my 4 lug setup on my 63.Got them out. Drill and air hammer. I recommend grinding them a little flat to get a good center punch on them. People mentioned 4 total I had to remove 6. View attachment 451340 View attachment 451341