I believe he is right about the power brake issue. Sounds like someone with more experience than I with power brakes. My autozone piece for for a B200 Van from 1985 is what I ordered. My donor piece from the junkyard was from the same vehicle, and since it came factory aluminum, I thought that is what I would get in exchange. When they handed me that steel cast one (and all of them on the shelf were like that) I was bummed, but the one out of the salvage yard didn't work well so that is why I bought that one. The aluminum ones are kinda hard to find and when I saw Rick's ad on here selling these at a pretty reasonable price, I jumped on it.