If you have a motor mount that has tears all the way through the rubber or it is just totally shot and you can't afford a new, head down to your local autoparts store and grab a tube of 3M window weld ($14. at AZ) it comes in a metal tube for a caulk gun. Remove the motor mount(support your motor first!) and tape off one side of the mount, lay down some newspaper and put a layer of ww down about 1/2" thick and mist it lightly with water from a spray bottle then do another layer, mist, another layer, mist, until it is filled.
Then let it sit for about half an hour or until a skin forms, then grab a bucket and fill it with water and submerge the motor mount in it overnight. Window weld requires moisture to cure and this will speed up the process, I have driven on a mount 12 hours after this and it was fully cured or you can just wait the time it says on the label and not do the water steps.
Window weld is urethane and it has a durometer of around 60-65 so it may transmit more vibes to the interior if after installing it is too much for you you can drill some holes through the window weld in the original mounts empty spots, I have never felt a need to!
It will make your car hook up like new and prevent wheel hop and is alot cheaper then those urethane inserts they sell for this to install into good mounts(so they don't have to be shot to do this if you want to limit wheel hop for the strip!)
It will definately save some money since some motor mounts can cost $100.00 and after doing this they will be like brand new!
R&R for shot motor mounts 
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