This is the info provided by Fast68Chevy to my questions on tie-rod end interchange when doing a 67-72 disc brake swap.
67-70 tie-rod ends will interchange.
71-up tie-rod ends will interchange.
67-70 ends are too small for 71-up, you must use 71-up inner and outer tie-rod ends when using 71-up spindles.
www.classicperform.com sells a custom tie-rod adjusting sleeve which will allow you to use the stock 67-70 inner tie rod ends/center link with 71-up outer rod ends.
When using 71-up spindles on a 67-70 (and not using the custom sleeve) you must change the centerlink to a 71-up to allow use of 71-up inner ends, adjusting sleeve and outer ends.
The pitman arm and idler arm on a 68-up with power steering and a 64-up with manual steering WILL fit into any 71-up centerlink.
Pitman arms will all fit the centerlinks of all Chevy IFS years with manual steering, and late 68-up with power steering. The splined end for the sector shaft of the boxes differ in diameter between manual steering and early 68-down power steering.
4x4 boxes wont fit 4x2 arms and vice versa.
[This message has been edited by 68dontneedanewone (edited 11-18-2001).]