I have ZERO experience with breaking anything (not complaining about that).
However, looking at some math and all of the physics that go with it, I really don't think that I personally would want single shot injectors in my PMR truck. Yes, mine has PMRs and I'm not trying to dissuade you from getting them. It just happens to bother me that the one large unbuffered "bang" from a single shot injector may not be conducive to long PMR life.
I may be talking out of my butt though.
I'm sure that Jonathan at Swamps will get you some kick-*** tunes made up for those injectors. I'll get something similar once I get my forged rod short block rebuilt.....