‘73 dart swinger 3 speed manual trans convert to 4 speed

They will all fit, but shifter mounting bosses are different between platforms A vs B,E,C.
You want an A833 'a body' or 'short tail'
and youll need a 727 yoke unless you end up with those funny mid year ones with a 904 tail shaft. I f you can't find one, you can use the long, or '727 length" e body rearest mounting location with the help of a fabricated plate that would move the shifter into the correct A body location. For instance I couldn't find one at the time and so I use one like in the pic below, dual mounting boss b/e 833. Though I've found 7 or 8 a body 833's since...i don't bother changing it because with it...my cars cross weight ratio is like 49%.

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