vibration in a motor plate car

I was thinking about building my next A body with a hemi. I hear from a few hemi A body owners that by using a motor plate (elephant ears) there is more room for exhaust headers and the steering shaft. My question is, because my car will be street driven, how bad will the vibration be ? If I decide to go with standard type mounts, where can I get them, and where can I get headers ?
Author: admin