Reagan`s low JA rating came in Gallup polling, 35% for Jan 28-31, 1983. You're right about Reagan being at 43% March 6-9 1987 during Iran-Contra. The highest unemployment rate under Reagan came in 1982 when it hit 9.7%. Dropping to 5.3% by 1989.
unemployment hit 10.9% in Dec 1982. 9.7% was for the full year 1982.