no ever talks about the ball joint just the birfields any info would help

 

The ball and claw style axles? Well they are known to be the weak point in the early FJ's. Also, they aren't very desired because you are unable to do a disc brake conversion easily.

What exactly are you looking for? Diagrams? The axle housing is also different/smaller than the post 67(?).

 

well iam trying to figure best way to put disc brakes on it i have a 82 truck front end i want to swap the disc brakes off

 

Well, i would suggest getting a set of later style FJ40 inner axles, grinding inside the ball (for clearance on the birf) and slapping that junk on it! Use the birfs from the mini, one of the axle shafts might be the correct length but i can't remember off the top of my head, ih8mud tech has all the info you would need there. The mini rotors aren't the best but a bunch better than drums!

Edit: i am assuming you realise that you need the entire knuckle setup and will need different steering arms...

 

so it sounds like i should scrap the idea because after all i still have the birfield

 

Hell no, go ahead with it. you need to use the minitruck birfs, knuckles and breaks. You will need one or 2 inner axles though.

Birfs are great!