Flip hangers? Bore out holes?

So, I was putting in my new HD springs from espo and said hey, these are stiff , lets (me and the dog) lower the car a bit. Everyone says flip your hangers, so I friggin tried that.

My hangers have a bolt pattern matching my car that does not allow them to flip unless I ream / redrill holes which I aint about to do on this car. It is specifically designed so drunk people at the factory cannot install the hangers upside down. Am I missing something here?

Do the multi hole hangers from arengineering fit my factory hanger bolt pattern or am I going to have to ream to make them fit too?

Any light shed on this situation is much appreciated.