SS396 would have been X66, or X22
X11 was non 396/ non Z28/ but included SS350 with Bright trim.
and X11 or X44 could be a COPO 427
X code's here
http://www.camaros.org/numbers.shtml#VINvsStyle
1969 Norwood Camaro Fisher Code Interpretation with Z21 (or Z22) without Z21 (or Z22)
----------------------- ----------------------
X11* non-SS396, non-Z28, X44* non-SS, non-Z28
includes SS350 X55 SS350
X22 SS396 X66 SS396
X33 Z28 X77 Z28
* COPO Camaros were an exception, as most COPOs
were built out of bodies coded with X11 or X44.
Some early Yenko COPOs had X66-coded bodies.
Additional 1969 Norwood Fisher codes that were
used instead of the X-codes include:
Z10 - Indy Pace Car replica coupe
Z11 - Indy Pace Car replica convertible
Additional 1969 Norwood Fisher codes that could be
combined with the X-codes include:
D80 - signifies the car was equipped with D80
spoilers, but the code was not always used.
A - signifies the car was equipped with power
windows, but the code was not always used.