The v6 pump I worked on had two small holes in the restrictor instead of one from the factory. In trying to knock out the restrictor to figure out how to drill it, I ended up puching a hole between the two holes accidently. So I ended up with one large hole. For some reason the restrictor would not come out by lightly tapping it out. It ended up working out just fine.
Good luck
Same happened here. I tried punching it out and it broke out. Been running it for a long time with no problems. Works great