66 273 to a 65 A833 and all into 67 dart?

You'll need a ball & trunion driveshaft to go with the '65 833.
The '65 speedometer cable should mate to your '67 speedometer.
Use '67 and up pedals and clutch linkage.
Throttle linkage may need to be modified from the /6 one in the '67, don't recall if the '67 slants still used mechanical linkage or cable.
Will need a '69 and earlier V8 radiator.
Need '67 and up 273/318 exhaust manifolds or headers.
Need swap mounts/brackets for smallblock into '67-'72 /6 K frame. Schumacher went bye-bye, so try TransDapt. Most kits are for 340/360 so some mods will be required. Plan B: Modify '70s truck mounts. Plan C: build your own.