best auto floor shift ?

[ole dollor]

looking to change out my old granny 4 speed to a th350 auto, been looking at lokar floor shifts and b&m. the lokar's have one that bolts to the floor and one that bolts to the trans, i am thinking of a 23" shifter....any way i also want room to move my under dash a/c to the center of the dash and not be mostly on the right side like it is now, has any on here done the auto floor shift and what shifter did you use....and will it be back further from the dash to give me more room to move my a/c to the middle. also have a bench seat at this time.