4spd???

ok im putting an a833 with floor shift(Pistol grip)into a 65DartGT when i set the 4spd next to the 3spd WOW somtins not a gonna work(or will it) first the xmember mount sits back behind the shifter mech plate and im not sure if its a "long"shaft or "Short"shaft(tailhousing) tail housing measures like 17"?? im baffeled tranny was sposed to be out of a duster??thanx ---sorry i asked this similar? in a different post didnt know there was a thread dedicated to 4spds OOOps