1971 Duster 340 - 727 to 4spd swap > EVERYTHING NEEDED (New England)

Not for the faint of heart. I'm speaking from experience. I only did it because I'm doing a complete rotisserie restoration on my Duster. If I started with the car you have, I'd have never gone down this road.

The Brewers kit is pricey, but you'll spend almost as much trying to piece meal it together. This is not a budget friendly swap.

You'll need...
A-833 transmission (and possibly a rebuild kit)
Hurst shifter body (and possibly a rebuild kit)
Shifter to trans adapter plate, plus bolts
Shifter handle
Shifter handle knob
Shifter handle rubber boot
Floor to shifter handle boot bezel ring
Shift linkage rods, and accessories
Bell housing, complete with inspection cover
Bell housing ball stud
Clutch fork
Clutch fork return spring
Clutch fork boot
Clutch fork pivot inside bell housing
Clutch fork adjustment rod
Throw out bearing
Pressure plate
Clutch disc
Flywheel
Pilot bearing
Clutch pedal assembly
Clutch rod
Z bar
Z bar bushings
Frame ball stud
Frame ball stud support bracket
Firewall clutch rod boot
Clutch and brake pedal rubber covers
Clutch and brake pedal bezels (optional)
Reverse lamp switch
Reverse lamp wiring harness
Reverse gear indicator light (optional)
Speedometer cable and gear (IDK if the 727 cable can swap over)
4 speed trans tunnel hump
4 speed carpet
Driveshaft possibly, or at least a yoke
U joints
Floor shift steering column (if currently a column shift)
New starter (possibly)
All associated bolts, bushings, bearings, seals, gaskets, and retainers

I sure I've missed something, but this list will get you started.