I had to make a restricter plate for my IAC because I had the same problem. Fixed it in five minutes with scrap sheet metal, tine snips and two drill bits. Didn't take a pic, don't know if it was even the right thing to do, all I know is that it works for thousands of miles now and counting.
1995 GT. HCI 3500stall 4.10 gears.
1986 SVO project.