Transamdriver75

I have a 2011 l96, recently converted over to ls3 manifold. I purchased it brand new and did not come with injectors. I found that lingenfelter sells adapter injector orings to fit "standard size" injectors into the bigger injector bore ls3 manifold. My problem is that even with those orings, I can't tell if the injector will sit all the way down in the bore or not, looks like the nozzle tip contacts the manifold but should it extend down below the opening? Hopefully somebody can weed through my post and give me a yes or no from past experience. I will get some pictures and try to get a measurement on these puppies.