Not shifting into 3rd/4th?!?!?!

Hey everyone, yesterday I installed my 4 speed and 340 into the cuda but I will not shift into 3rd/4th gear!! I used ghe brass pilot bushing which was very tight when inserting the alignment tool, not sure if that is a possible cause, and when installing the trans, it made a few creaking sounds, again not sure if I should be worried. I have not run the car yet, simply just installed the shift linkage, until I got them all in neutral but 1-2 is fine, 3-4 is not. Any ideas?!?!?!