[decooney]

Originally Posted by CJ428CJ

Here are the instructions that ERA provides: http://erareplicas.com/427man/engine/mountmod/index.htm
I did it on my car and it made a world of difference.
Chris

In addition to this modification link Chris sent above, I added another step. I fabbed up a 1/4" thick plate of steel about 2"x2" (maybe a tad larger) and used it in place of a round hardended washer on the back side of the mount where the nut goes on the bolt threads. It applies a broader clamping force to the backside of the motor mount and allows you to tighten down on the mount without distorting the rubber as much. Has a MUCH more solid feel to the motor and I don't get the sidepipes hitting the body any more like I use to from torque of the FE. Works great.