64 Dart Project, need help please

We were finishing up on getting the Hurst Super Shifter linkage fitted up when I notice that the tail shaft is sitting almost against the trans tunnel. I can reach in with two fingers so I'm guessing I have about 2 inches of clearance. Seems to me that's not enough. I have two poly motor mounts and a poly tranny mount. I haven't measure the angle of the motor sitting in the engine bay but I'm guessing it's a little high due to no give from the poly mounts. Can someone who is running a 4 speed check theirs and let me know. Thanks.