Swapping to discs, steering linkage too?

[ZZ4Blazer]

Long story short, Im tired of my 67 sitting in the garage. Ive already got my PB dropmember sitting in my living room waiting to go in, but I dont have the time or money for that this summer for that as I decided last winter to go back to school.

Im gonna throw my 73+ drop spindles on(converting to stock discs), throw the bags in, and enjoy it for the rest of the summer like that. Eventually adding onto the air system by the end of summer and probably dragging the control arms just about off.

I know the ball joints need swapped out for the different spindles, but does the whole steering linkage need to be updated to the 73-87 as well? Or can I just get away with outer tie rods?

Id rather not have to replace the whole thing cause I wont be using it next year as I'll have the r&p with my dropmember.