Decode the VIN HERE.jtheshowstoppper said:
GM Build Codes.
Below are some codes that might possibly be found on your body tag, as well as the build sheet (look under the seats, stuffed into the seat springs, behind the seat, under the carpet, etc.).
Build Sheet Numbers
B22 Door trim pad emblem " SS "
PM7 F60-15 White letters, SS models. (also Sprint SP models).
X11 Style Trim for base car or SS
X22 Style Trim for SS with 396
X55 Base SS with 350
X66 Base SS with 396
Z27 SS equipment
Z15 SS equipment. (454 in '70)
Engine Codes
SS350= P
SS396/325hp= N
SS396/375hp= K