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Posted

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?

 

this main bearing girdle was on some 4.0 motors. this one was on a stock motor. so, why not all 4.0 motors. or is it.

what can you tell me about the history??? dave

 

thanks

Posted

It was brought in around '96 (?) when Chrysler was trying to refine the 4.0. It was part of an NVH program (Noise, Vibration, Harshness).

 

Rob

 

As well the 1996 and up blocks have extra ribbing for better structural integrity. Which is why I am building my stroker based off one of those.

Posted

thanks for the fast reply's. pat at mickey thompsons daughters suop here in eugene has to make another one for a customer. he didn't know anything about it, so i said i would ask the crew at cc.

 

thanks again.

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