Debating on A Body or B Body for first car

I would look for a 68 -75 A body like a Dart/Demon or Scamp/Duster. They are easier to find parts for and easier to work on and modify. You can put a 440 in them pretty easy if you wish. The early A's are fun but because of their smaller size, are harder to work on and tougher to find parts for, both used and repopped.