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jbirds510

Dog bones!

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Anyone know if the 521 and 620 dogbones and spindles will interchange? Are they pretty much the same 66-77? I have a 521 with a smoked kingpin and as many of you know the kingpin kits are rare and expensive. Can I bolt

in 620 ones?

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I don't think the pin kits are the same either and the actual dog bone part numbers are way different. I would ask Mike (Mklotz70) on here. https://ratsun.net/profile/11-mklotz70/

 

I think if they were someone would have done this and I would have heard something.

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Will the upper lower and dogbone swap over to a 521 frame as a unit?

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I know king pin guys are swapping to ball joint on 620’s so I guess what I’m asking is can I swap all the 620 kingpin shit onto a 521 frame?

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UCA's and LCA's will swap with some minor differences since the 620 is metric.

 

Just swapping the dogbone on the arms should work too.  Here's the differences with the lower fulcrum pin

 

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find another 521 and cut the dogbone set out and have it redone.

 

521 kits are still avail overseas

 

 

521 is SAE  620 stuff is Metric

Edited by banzai510(hainz)
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Ok so I picked up a frame from a 73 620 the guy cut off just aft of the torsion bars. Kingpins are tight! Gonna just use the dogbone/king pin and spindle for my completely blown out one. Got the whole clip for 100 bucks. Hope it works, if not I’m not really out a heck of a lot and got to meet a pretty awesome Datsun guy in the process!

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23 hours ago, mklotz70 said:

UCA's and LCA's will swap with some minor differences since the 620 is metric.

 

Just swapping the dogbone on the arms should work too.  Here's the differences with the lower fulcrum pin

 

Thank you 🙏 @mklotz70

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