1975 Decoding info

It's a 1975 Gold Duster for sure, from what I can tell this car might be a dealer bought showroom car. It was then "leased" by the original owner before she bought it. Everything that did decode is spot on that I can tell, I'm curious about the codes that didn't decode. like what type of rearend and what gear ratio is in this car?? 230hp engine in 1975 with standard duty torqueflight seems more then what was offered as standard fare in the mid seventies.

Added the pics I have again so everyone can take a good look at this car.

duster1a.JPG

duster2a.JPG

duster3a.JPG