I replaced the transmission mount. Can you change the tourque arm mount as well? If so, it is hard?

 

nah-i think its harder ensuring that you get the correct one for your car-there are 3 or 4 styles that gm used over the years just take a good look at the one in the car, or if its toast look at the shape of the torque arm and note which direction the rolled outside "lips" face towards-drivers side or to the pass.side. plus the torque arm is going to fight your replacement efforts by wanting to slam up thru the top of the trans tunnel-depending how the car is supported to work on, hold it downwards with a block or set a prybar or something thru it so it dont suprise you-later