Air bag (and brake) question

[datsunfreak]

Any insight as to whether it's easier/better to do an air bag conversion on the early front end (kingpin?) or the later (ball joint)? And if one has the ability to go lower than the other?

 

Going to start on building a '77 620KC soon and it came with a spare complete '78 frame (disc brakes and ball joints).

 

Also curious if anyone has ever tried a 4-lug hub on a 620 spindle? 

[datsunfreak]

Looked up a few specs... 

 

Most 4-lug Datsun hubs use these bearings: 1.250 ID inner, 0.75 ID outer. The 620 uses 1.375 inner and 0.844 outer. 

 

So it comes down to if you could machine the spindles down to the smaller diameter safely...   ^_^

[INDY510]

710 spindles are a lot bigger than 510 spindles ... I think 280zx size spindles might be big enough for a truck

[datsunfreak]

710 spindles are a lot bigger than 510 spindles ... I think 280zx size spindles might be big enough for a truck

 

280Z/280ZX/S12 all show to be the above listed size. 620 is bigger than all of them.   :sleep:

[datsunfreak]

And I may be crazy, but it doesn't seem like it would be dangerous to mill 1/10" off of it? 

[teagueauto21]

If I had to guess, it would be better to bag with kingpins since they don't bind up And wear out like balljoints do. As for the 4 lug swap it would be way less hassle just to do the toyota 5 lug swap, you wouldnt have to machine the spindles as much and if im not mistaken the rear axle shafts have the same splines. "Don't hold me to that"

[datsunfreak]

If I had to guess, it would be better to bag with kingpins since they don't bind up And wear out like balljoints do. 

 

Thanks!

 

As for the 4 lug swap it would be way less hassle just to do the toyota 5 lug swap, you wouldnt have to machine the spindles as much

 

I was planning a 280ZX rear suspension, so that's why I want 4-lug fronts. And I already have a set of 4-lug wheels that would be perfect for it...    :rofl:

[datsunfreak]

But now I'm also kind of wondering if 411 or Roadster spindles would fit...   :devil:

[kelowg]

kingpin vs ball joint also depends on if kingpins r in good shape(not worn and loose) ball joint give alot of negative camber, but some ppl like the look.

[datsunfreak]

 

depends on if kingpins r in good shape(not worn and loose)

 

My money is on worn out, but we shall see...

 

ball joint give alot of negative camber, but some ppl like the look.

 

Ooooooooooo...  B)

[hobospyder]

Also curious if anyone has ever tried a 4-lug hub on a 620 spindle?

there's a 4 lug 620 up here in the Puget sound. Can't remember fully what he did other than extra holes and stock parts so if he wants to return to six lug in the future it's just moving and adding lugs.

[datsunfreak]

there's a 4 lug 620 up here in the Puget sound. Can't remember fully what he did other than extra holes and stock parts so if he wants to return to six lug in the future it's just moving and adding lugs.

 

I know some guys machine down the hubs on the outside for clearance with certain wheels. Might be able to machine it down and redrill it to 4-lug...