Thank you for your reply. The 223 is pretty close in function. The shop manual shows its output slightly different and, as you mentioned, the shaft length is shorter. The shaft diMeter might even be a little smaller as well, but I can't remember. I can post a picture of the chart if you're interested.
For the price of the pump, it seems worth purchasing and making a spacer to align the pully and try it out. My pump is the short one, so it may be a good fit with my existing hoses. New pump is on its way.
I'm in CA. I would like to make it to a Slick-Stock some day. If I can get there, I'll give you a heads up.