what kind of 4 speed tranny was in the slant six dusters?

i have what i believe is 883 4 speed tranny with overdrive and was wondering if the duster came with that tranny with a slant six.. i bought the tranny and clutch setup out of a 74 duster 4 speed car, it came with the clutch pedals but the motor and bellhousing was missing...

any info on the dusters what came what would help thank you....

also whats a good 4 speed tranny thats common to find that would fit in my 74 duster 318