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#846 - Cummins Swap
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The bolt holes are more or less in a straight line on 4 1/4" centers. My laser came in handy for aligning the holes (which are also the centerline of the air-springs and the 3ft long mounting arms) which all had to position correctly (plumb) beneath the upper spring mount on the chassis. As is shown in the pics following, the 6" dia. circular 1/4" upper spring mount disc needs to be offset from the chassis beam enough to allow access to the mounting bolts and air-line hardware.


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