B41 is power brakes NOT manual brakes
A91 is deluxe insulation package (heavy matting under the carpet)
M38 aluminum appliqué on rear deck panel (between tail lights) which is part of the A63 package
M52 manual sunroof vinyl top
G54 left chrome racing mirror
G64 right chrome racing mirror
G74 chrome racing mirrors
N38 is non catalytic exhaust system
U means built for US market
I think you got all the codes decoded now for the 3rd line and up?
The CTD means there is a second fender tag so get the seller to take a pic of it too. It would have perhaps R31 (rear speaker if it had the option) either L1 or L2 for the production line it came off at the plant and 26 for the 26” rad that was standard for 360 cars.
