Another disc brake conversion question, real 340 swinger

4mulas said

Does this mean 69 tie rods are good to go in the newer 73 up ball joint? Ie I can retain my existing ones if they are good...

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Different part number for 69 back a body tie rod ends. 70-76 are the same part number.

I'd use the 73-76 center link for reason stated.
Your in the $100 range to replace everything steering linkage related. 4 rod ends, idler arm, pitman arm.