Hi guys,
I woke up this morning to find my starter was finally pretty shot.  I
have an extra one lying around though, so I went ahead and removed the
old one (and it's cold outside!)

Problem is, it turns out the one I just took off my van doesn't look
like the extra one I have.

The one I want to put on looks like the picture on Ken's website for
vanagain: http://www.vanagain.com/images/s_sr18x.jpg

But the one I just took off looks like this:
http://www2.cip1.com/photos/BOS-SR19X-2.jpg

What's going on here?  Can I do something to the extra starter I have to
make it work with my van?  Or do I need to order a new (rebuilt) one?

Thanks very much for any help... I'm anxious to get back on the road.

-Wes