my cowl tag read like this:

SE
ST 66-13617 BODY BF 709
TR 731 PAINT FF
ACC 912

Also in the door jam is:
1361767Z101826

thanks for any help!

1966 Malibu V8 in Marina Blue with blue bucket seats built early in the model year, late Sept 1965 at Fremont CA.

SE - should be 09E for the month and week built, Sept. 1965, 5th production week of September

ST 66-13617 BODY BF 709
ST is short for STyle
66-13617 - 1966 Chevelle Malibu 2 dr sport coupe
BF - Fisher plant code for Fremont
709 - Body serial number (they built 708 2 dr sport coupe prior to this one, unknown if all made it thru to final production)

TR 731 PAINT FF
TR is short for TRim
731 - Blue Vinyl Bucket seats
FF - Upper and lower paint colors FF - Marina Blue solid paint
ACC 912
912 - Internal plant processing code unrelated to the car itself. Just a means to track it.

Also in the door jam is:
136176Z101826
1 - Chevrolet
36 - Chevelle Malibu V8 (optional engines not coded)
17 - 2 dr sport coupe (hardtop)
6 - 1966
Z - Fremont CA final assemblu plant
101826 - Production sequence number, this is the 1,826 Chevelle to be built at Fremont (incl. all models in the Chevelle.