OBD0 ECUs don't need jumpers cut. Install chip, be happy, usually.
As far as why it's reving up that high, If the ECU was not working corrrectly, you would be getting some kind of indication at the ECU that you botched it up. I would look for a vaccuum leak. The easiest way to test for a vaccuum leak is to get a large, really cheap can of carb cleaner. Let the car idle, then start spraying the carb cleaner all over the intake manifold. If the idle dips or the car stalls, that is the area of your vacuum leak. If it passes this test, then it's probably the ECU, but just to be sure, I would follow the troubleshooting flowcharts for the idle circuits as found in the Helms.
Also, can y ou get good shots of the soldering done? You may have a cold or incomplete joint somewhere. This would be a pretty easy fix, as you would just desolder then reseolder the chip or socket.