37 tranny replacement

[1937sedandelivery]

Hello, my 37 Fordor has a bad tranny and needs to be replaced. I have never done this before.
Question1: can I somehow replace the tranny without moving the rear end? I read somewhere that the rear end needs to be disconnected so that it can be lowered and pulled back enough to remove the driveline, etc. That all makes send but I don't have the means to easily do this, so am asking for any work arounds.

Question 2: I bought a replacement tranny but after removing the top end it looks slightly different from the original in the car now. Please see two pics attached. First one is the one that is installed. Second one is the one I bought, which is supposed to be from a 37.

Thanks so much,
gregg