Does anyone know how to tell what if a frame is set up for a KP or BJ front end?It is a brand new frame that is not put together. Thanks

mock up the side rails on the floor as they should be welded together then measure between the mounts. BJ is wider than a kingpin.

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the front clamps are higher on a bj the kingpin is closer and more narrower

When you mock it up, the ball joint frame will measure, from upper clamp center to lower clamp center of about
5 7/8"
Link/pin would be about 5 1/4"

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Thanks for the quick responses