the strut setup is the same design as a celica, supra, carolla from 78-85ish. they are all the same base parts, just different dimensions.
you can mix n match some parts to get a stiffer front end, or just to have more options for aftermarket parts and better brakes.
there is a guy who goes by A2ndopinion @ www.celica-gts.com
with a thread titled "wagon improvements"
i forget just what he swapped but its listed in the thread, unfortunatly the site is down right now, but i promise it will be back up in a day or so.
course this is assuming that you do have struts, 78 was a switch over year. so you either have struts or a pickup dual A arm setup. and there isnt crap for the A arm setup. one of these days im going to see if a newer truck A arm setup will bolt on so we could use drop spindles for a 85 pickup.