Front crossmember change on 68

[JMorg]

I have the front crossmember with control arms and spindles from a 1981 chevy to install in my 68 for the disc conversion. My question is what do I have to do for the steering linkage? Before I install and trial and error the situation, I was hoping I could get a heads up on what to use. Certain years trucks or do I need to buy a custom application? 2WD with power steering if that helps. Thanx in advance.