Have you ever checked out original Hemicuda's to see how their shakers sit?
I don't have any pictures Hemicudas, but here is my original 440+6 Cuda using 100% OEM parts......
Just sayin'....
I have looked around and pictures on the net and have found them from sitting what look way too low to up where I think they should sit. Now the problem is I have no ideas what ones are original or not.
I can tell you that the way mine was the seal at the back of the shaker didn't even hit the hood, as you can see the voltage regulator in the picture I posted. Also the fan almost hit the top of the shroud, based on thoose two things it seemed wrong so I fixed it.