Umm... yer hosed, if he's got a bent draglink on an '87, and you're trying to find it in a yard. '87's don't have draglinks stock.
The pitman arm is attached to the steering gearbox.
The idler arm is on the other side of the truck, and looks kinda like a pitman arm on a supershrunken steering box.
The thing that runs side to side attached to the pitman arm and the idler arm is a center link.
The joints that attach to the center link about 4" inboard of the pitman arm and idler arm, are inner tie rod ends.
The connecting tubes attached to the inner tie rod ends, are tie rods.
The joints on the other end of those rods, at the wheel, are outer tie rod ends.
The arm that is on the knuckle, is a knuckle arm.
And I'd take off the bent parts, take them with you to the yard, and say "I need this part, not bent". I've seen all kinds of things sold as pitman arms, and if you don't know what it's called, you're gonna be hard pressed to tell the guy that he just brought you the wrong part.