CivicEKCP

Me and a friend were working on this guys Del Sol...replaced AC Compressor and Recharged...that works great...He also wanted us to see if we could fix this shaking that his car is doing...We have kind of narrowed it down to motor mounts but I wanted to get some Ideas from you guys as well....

The car has a really bad shake only if you are on the gas at or above 4k rpm...His Driver side lower mount is deffinatly shot...and the passenger side lower tranny mount is about to go...Do you guy thing that a busted motor mount can cause a teeth shattering shake in the whole car? or do you think it could be something else as well? TIA