It's a VERY good idea if you have a higher mileage car! A buddy of mine with 65k on his gt didn't and boy was it a p.i.t.a. until we swapped his mounts the next day. Save yourself a big headache and buy a set, but be prepared to change your steering shaft to a flaming river design that does away with the rag-joint because most likely it'll rub pretty good...
i didnt have a prob geting my bbk's in............but i did have to lift the motor up again before i could drive it cause lifting it the first time shot the $hit outta them.............I WAS PIST>