Just a thought... getting your endorsement in something like a Husky, a Super Cub, or one of the Cub Crafters aircraft you see on the Tac Aero site with bigger tires *should* actually reduce the amount of time for your endorsement, but if you then want to go fly something like an older Chief or Cub, you really might need some more hours, and not all taildraggers are an easy transfer for a rookie, such as going from a Super Cub to a spring-steel gear Cessna 140. They will simply feel different.
The Husky I taught in briefly was a more forgiving trainer IMO, than the J-3 Cub I was also teaching in at the same time, and I've experienced the same kind of thing even in a fat-tire Cessna 180.