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Poly motor mount inserts for V8 73-76 a-bodies
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Posted by: tml1138

I bought the black poly inserts from Energy Suspension p/n 5-1106, and I'm having issues with the inserts. The front ones are fine, but the back ones are two different sizes and it doesn't make sense to me. Energy Suspension says the kit is right, but I can't see how. The two front bushings are marked 1143 and are the same. The back two are different, one is marked 1142 and the other 1151. The 1151 will work fine, but the 1142 is thicker and won't install into the k-member, and the inner sleeve that presses through the insert once installed in the motor mount would be too short. However it's a perfect fit for the 1151. I've checked AutoZone and Advance Auto Parts for reference, and their stock rubber inserts are the same part # for left and right motor mounts. This means to me that the poly inserts should be the exact same as well. The cradles where the motor mounts bolt in the k-member are the same too.

Anyone have this problem or know what's going on?

Thanks!

-Troy

Posted by: MadScientistMatt

It seems you may have a set of 340/360 inserts instead of ones made for a 318.

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