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521 king pins


kelowg

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anyone know if 620 kingpin knuckle/spindals  can be fitted  onto the 521? if so what pins and bushing would i use, 521 or 620 or combination of the two? thinking since king pins are bad and wheel bearings r orginal, 620 bearings are still availalbe but 521 bearings r not.  but 521 kp kits have gotten hard to find except ones priced over 200.00

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Does anyone have the kingpin specs from the factory manual?   As far as I can tell, the kingpins were the same as far back as '59, so I don't know why they would have changed them for the last couple of years. 

 

If you end up with 521 spindles on your truck, you can use these to run the available 620 drum inner bearing.

 

6th item down.  http://www.bluehandsinc.com/

 

I'm about 99% sure you can swap the 620 kingpin assembly(spindle/dogbone) onto the 521 with out any issue. 

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