Hen is right.. the FWD style pumps are all the same.. and the RWD pumps are all the same..
FWD pumps only use FWD pullies, and rwd use rwd pullies as they are different offsets..
they both pump the same amount of water.. the RWD ones are different as they have to deal with a fan hanging off the front.. if you use a fwd pump with a clutch fan.. it should die.. not over night.. but it will happen..