Does anyone know how many 89 irocs. were made with a 350 t top automatic trans

 

I doubt you can find an exact number.
The book I have shows a little over 20,000 IROCs + just shy of 4000 IROC ragtops.
Sorry no break down of 5.0 vs 5.7 motors.

 

All 350 had automatics, I was a GM tech back I would say that the 350 hard top was pretty rare. The only one I can think of was one ordered that way for the owners friend do drag racing. So I am saying that most of the 350 would be in that configuration.