i just glanced at the posts so hopefully this hasnt been said, but i have a poly trans mount on my truck, same mount thats used for a f-body,but im bout to take it off, had it on for about a year now and im still not happy with the extra vibration and stiffness

 

The original poster was 4x4. So it is a little different mount. Poly mounts will change the way you feel things compared to the stock mounts. It is what it is kind of thing.

 

to be completely honest, i barely have any more vibration, i mean its a tiny amount more but its barely even noticeable, what you can notice is its a little firmer but i dont mind it...it almost feels like the tires grip a little less on the 2nd gear shift though? but as a plus i havnt had any wheelhop whatsoever, my old trans mount....i should take a vid and post it on here...ive never seen one get so torn up in my life lol