318 LA rebuild after losing a valve seat

Yes, it does move just an inch or two like it's stuck in park. What is confusing me though, is before pushing it into the garage, I was able to turn the driver side wheel - but with GREAT resistance. I'm trying to figure out how it would get stuck in park after I got the car pushed in, but I guess anything is possible. Do I have to remove the tail shaft, or can I get it freed by just removing the VB? I understand the park rod comes out with the valve body.