pulled motor out for freeze plugs, now trans wont shift into park?

[71GeneralMotorsCorp]

Hey guys

After finishing up my motor pull for the freeze plugs, the transmission linkage was hooked back up behind the little spring on the linkage, got into the cab to make sure it'd go through all the gears, it did everything but park. My transmission is a turbo 350. I tried everything from moving the shifter back and up,to just up, and even crawling under it to manually move the linkage to no prevail. so now i took off the linkage and now it wont even shift out of neutral and drive, it's like stuck in those two gears now.

I'm just curious of why it's not going into park, and how to fix it.. thanks for your guys' time!