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You have completely misunderstood my instructions.
Ignore the 4.0 alternator. I know it isn't going to be the same as the 250 alternator.
Compare the part numbers of the alternators for the F-250s in question, like I told you to do, and see if they are the same.
My bad.
Doesn't matter anyhow, the person that used the 97 f250, if i remember right, got it off a 5.4l motor, and the person that had the listing for the 99 f250 supposedly could not check what motor it was, but I could clearly tell it was different -even in the terrible pics.
So there was no way to look up the part number and therefore, no way to accurately compare the two, unless every motor in 99 f250s had the same alt..which is possible, but I doubt.
Regardless, I found another good deal, so went a different route.
The only reason I wanted that one is because it was literally $20 shipped plus warrantee.
Thanks anyhow.
The new one should actually be here tomorrow or Monday, and it even has the single wire connection, unlike the other.
I might just go ahead and post if everything works, as it should.
There are a few other things I'm working on that may find their way here soon also..