[mattpatt]

I've seen where the stock rubber mounts allow the engine to move around enough for the headers to hit the body and the poly mounts solves this. I'm planning on a 351W based engine (getting close to ordering car and, if new, the engine, etc.). Anyone tried these? How is the vibration insulation to the frame? I had a 240Z once that I changed the stock rubber sway-bar, etc. bushings to poly and they really transmitted road shock to the car.