[wild one]

Yes, the drag links and idler arm off of a any 1/2 ton from 1973 - 198? will work (the ? is representing the final year that these trucks were all standard nut and bolt sizes before chevy started using metric junk). I personally used the entire steering setup from my donor truck which was a 1975 GMC heavy half ton.

Oh, and as far as the sway bar is concerned, you can use one off of any 1963 to 1987 chevy pickup regardless of the size (1/2 ton to 1 ton) or off of any 1988-1990 crew cab or suburban truck. If you use one from a 3/4 ton or 1 ton it will be a larger diameter i.e. stiffer and heavier bar. Be sure to get all the brackets and bolts with the bar, they are literally a one hour install with a drill and basic hand tools.