it might go in from the front, sideways, if the heater, isn't in the way of turning it, which I suspect it will be, particularly the defrost hoses .... you may be able to weasel it in from the driver side, but again, the defrost hoses will probably be in the way, so at minimum start with removing those and eyeball it again ..... it most likely will be that the heater does have to be removed, I've put them in before the heater
Bill