The red is PP1 (same as my 68 GTS)
BH23 = Barracuda coupe (notch)

SPD is 3/16/67
SO # is 62039

31 is 273 two barrel
5 is automatic
235 = 6.95 x 14 tires, set of 5
Ax/2 is 2.93 7-1/4 (if this were followed by an "8" it would be a Sure Grip)
H5V = High level trim, split vinyl bench, white/red
U (upper door paint) Q = dark red
M(2) - unknown
R(1) = 2W AM radio
T(4) = Vacuum gauge
Y(6) = Black vinyl top
j(4) = Body Sill Mouldings