As mentioned earlier, the radiator is a big issue. We have seen car running hotter for this reason, much which gets blamed on the Fronmounts. Be sure not to overlook the smaller things like the possibility you have a 15+ year old radiator cap. We have seen quite a few that do not pass a pressure test. We have had much success with a high eff. 3 row that is used in racing. We also have installed dual fan kit, but we never had to do both on the same car. Some front mounts are larger and heavier than ours and I can see where cooling is a concern, but it is by no means out of anyones reach.
Hope this helps,
John @ ESP