Normal idle is 850-950 RPM. The capri has a mechanical cold start fast idle valve portion, and you can see 2000RPM plus when it's very cold out.
It sounds like you are idling too high. let the car warm up, use the idle setscrew on the throttlebody and adjust the idle to 850-950.
Also, make sure your ignition timing is set correctly. Changing the timing can affect the idle speed.