So I had a lot of fun / difficulty getting my transmission into my truck and now I know why. The hole in the adapter plate for the transmission snout is a few thousands too small. I checked the clutch plate for correct splines and fit, I test fit the plate to my bell housing, but I never slipped the plate onto the transmission to make sure it slid on freely. It did not. Once I pried the trans out and removed the plate it was quick task to resize the plate with an air grinder. It was a very small amount of material to remove, but now she slides right on like butter.