Well, if you're in the process of editing, you might want to add this to the chassis codes or body type for the G1 under Digit 4-6.
KA2 = 86-87 4 Door Sedan
KA3 = 87-90 2 Door Coupe
KA4 = 88-90 4 Door Sedan
EDIT: For those of you non-USDM or Japanese owners, these chassis codes might help you;
KA1 = 85-89
KA5 = 88-89 Ti (turbo)
KA6 = 89 V6xi
I am not 100% positive on the last 3, but they should be right.
BTW, thanks for compiling this info. It has helped me a few times.