A '51 'glide will bolt up and you can keep your current rearend, but it will be a 4:11. The 50-54 'glide cars used a 3:55 rearend. You can use the column shifter from a 49-54 car, or you can use an aftermarket floor shifter of your choice.
I'm not positive, but there may be a difference in the 'K" member between stick and glide? unless someone else can confirm this, I would make some measurements just to be sure.
