An attempt at decoding the tag. No guarantees it's right, but it's close. And I didn't have the last code.
@Cuda Al is good at this, maybe he can weigh in.
B - Barracuda Model Line
H - High Price Class
29 - 2 door sports hardtop (fastback Barracuda)
52 - 340 4bbl HP
5 - 3-speed automatic
38 - E70x14 redlines steel belted
C18 - December 18, 1967 scheduled production build date
726523 - Shipping Order number
2 - 5 Drip rail mouldings
3 - 0 Belt moulding on door and quarter panel
7 - 8 Wheel lip mouldings
A - 4 3.23 ratio
X - no code indicates open rear end
T - D (Deluxe, Has 68 Barracuda Interior Décor Group)
R - 6 vinyl bucket seats
M - B black interior color
P - U roof color Frost Blue Poly
N - U body color Frost Blue Poly
T - monotone paint
U - U Interior Upper Door Color Frost Blue Poly
B
S - H red horizontal accent stripe (painted pin stripe)
F - 7 Formula S Package
R - 1 AM radio
a - 6 Console
b - 4 Bucket seats
h - 7 Hood mounted turn signal indicators
k - 7 Passenger outside manual mirror
m - 6 Driver's outside remote operated mirror
t - 6 I don't know, sorry!