Grab everything then, including the driveshaft.
If it worked in the 68, it should work in your 64.
Does it have the big or small bolt pattern ?
If memory serves me correct, its big bolt.
Might want to grab the rims to.
the thing is the drive shaft connects differently than mine my drive shaft bolts on to the tail piece its a push button 904 the one on the dart slips inside to the trans so the shaft might not work what do you think