Stop in for a cup of coffee

Well then it shouldn't be that different.
Possibilities are some California vs 49 state difference emmissions related thing. Unlikely.
Early vs late production seatbelt interconnection thingamajig. possible
Something different about the duster vs valiant powerwise. (optioned differently) minor possibility.

Put pics up of both if you can,
The duster was missing the starter relay so I have no way of knowing what was there.

The Duster was bought from another FABO member and he doesn't know much history of the car but it seems someone used it as a parts car at some point because a lot of small items were missing.

Starter relay
Starter
engine wiring harness
Throttle bracket and cable
gas pedal
alternator and brackets
A/C compressor
front engine pulleys
Front and rear bench seats

those items were all missing