Idler arms early a vs 67 up cars

moparmat2000 said

67 can be modded to 68-72 if you make a geometry correct accurate jig made off a 68-72 K frame. Pix below are A 67 slant 6 K that using a jig I made to mod it into a V8, and another jig into a 68-72 K frame. There are more slanty Ks than V8 Ks. If you have a rotted or bent V8 K frame and a solid , straight slant 6 K frame, it makes a lot of sense to convert it. The idler arm mount and RH V8 mount for the converted slanty K came from a V8 K that was rotted out in the middle. Motor mount is done. I still need to weld the 68 up idler mount in, and unbolt the jig. Then sandblast and paint it. The jig holes are drilled and welded to steel tubes that accurately locate the bolts so there is no slop in it.

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That jig off the steering box mount is sheer genius.

That said.......If you read the MP suspension book on how to set up the Mopar front suspension, it becomes clear that getting it "close" in regards to the idler arm angle is really "good enough". The book shows how to get the arm in exactly the correct position by filing the top and bottom holes, so as long as the bracket is in the ballpark, you got it licked.

Of course, when you have a really simple jig like that, it makes it pretty easy to get it dead on, and there's certainly nothing wrong with that.

ALL THAT said, Is this really a mod that you NEED? "I" have not witnessed ANY failures of early A body idler arm brackets. I'm sure it's happened, but it just must not be that frequent. But that genius jig even makes me think about it.