Yes. Not Delray. LOL. You can open them up quite a bit. Just be wary of punching though the back side. I use a dremel.
Bearing in mind that I am still not Delray, here is an instruction sheet I did up a few years ago for maxing out your HS governor setting.
Loosen up the 1/4" hex screw that holds the 2 pieces of the governor arm together.
Rotate the governor rod coming out of the block clockwise with some pliers or a small crescent wrench. DON'T force it.
Keeping the rod rotated, push the top of the governor arm to the right to cause the throttle to open to “wide open throttle. “
Holding all of that, re-tighten the ¼” hex screw.
Basically the governor rod coming out of the engine is all the way to the right when the throttle is all the way to the right.
Naturally this needs to be done with all links/springs in place and if you change anything you need to re-adjust as described.