tyvm!!!October 86. Please see the attached file. Sorry for the bad quality on the frame number reference list. My good quality copy of the microfiche only has frame numbers through early '86 and didn't cover your frame number. I have a bad quality copy that goes further. The frame number number is the last six digits of your VIN: 136989. you find the first frame number greater than yours and go to the previous month. November '86 stars with 137xxx, and October starts with 1366?? so your build date is October '86.