if your car was an auto oringinally your rear mount if on the cross member in a little bit different location. there are a coulpe of outs to this problem, normally i see people just have the mount welded to the crossmember where it needs to be. the other is to get the steering rack out of a 5-speed car and swap it out. sorry to be the bearer of bad news but i have the same problem right now.
if it was just the engine and not your car that was auto you will need a 5 speed rear mount bracket, which is an easy and normally cheap fix.