don't put much of a cam in it unless you work rith the trans too.  the stock trans' have too low a stall speed to take advantage of what the cam would have too offer.  most automatic  trans equipped cars have a tall rear end gear to boot and this could make things worse.  if you don't modify the trans/converter then you should consider changing the rear gear ratio to something along the lines of 3:55 - 3:73 or so for street driving.  what you need is torque. you need to seriously consider what type of driving the car is subjected to.

The later model 80's stock  turbo cams have more lift then the roller and stock Pinto cams if you want to keep it a slapper cam.

I don't know if this will help or muddy the waters, but some of the cam makers used to offer a regrinding service for stock cams. If you can track one down that still offers this service THEY may very well have a suggested grind for your application.

If they still do custom grinds but don't want to make a suggestion, you might be able to still do something economical using the stock cam once you find a grind that you like, if the journals are in decent shape.

P.S. I would be VERY surprised if the OEM cam being used with an automatic transmission mated with the 2.3 was the same speification as the one used for a factory MANUAL transmission car-even in the Pintos, as the torque requirements to get efficiently rolling would be different from auto. to manual. Just about every car that I've had occasion to check specifications for over the years has used a different cam for automatic vs manual, but I've been wrong before.

This may help you with an idea of specifications and a source for a replacement cam at low cost:
 http://www.performanceparts.ford.com/parts/part_details.asp?PartKeyField=798