to replace the strut mounts, you need the coil compressor anyway. it would only take 2 minutes to just replace the strut at the same time. the gt struts make the v6 just a tiny tad stiffer, but i like it. and they are cheap. if you dont replace the struts( like that guy said, i replace mine by 50k, leaking or not, so it would be a wise move, since its the same install job anyway) you could replace just the strut mount bearings for about 60.00 plus the spring tool, and a couple hours labor. that guy is way high on the price, but maybe thats what a shop charges.
05 V6 auto,
"The V6inator" torch red, base, amustangrocksleather padded leather armrest, shift boot and e-brake cover