68 Dodge Dart

Well, you certainly haver some good raw material for a sleeper if that's your choice. A-body parts are pretty common & interchange pretty easily. Whatever you decide, I'd build the car on paper first, see what you can affiord & do yourself, & adjust from there. Judging from the pics, if it were me, a simple going through the suspension, re-do the interior & if you like some body work & go the "simple & clean" route. Aftermarket wheels are esy to do, so I'd save that for last.
Now if this is a car you plan to learn evrything on, I'd stat dismantling eveything, taking pictures as you go and research what others have done. Once you have a plan, go back to the "paper build-up" and have at it.