Chuck,
My former c152 Texas Taildragger didn't have the so called "Bolen' extended legs and was a real pig to handle. Even had it been so fitted, we discovered that the original conversion had been incorrectly setup with the gear boxes set so as to allow for 'toe-out' of the wheels. This meant it was unusually directionally unstable!!
It was all too much, and after it went into the workshop for some wing repairs, (following an arguement with a gum tree), we put the training wheel back ahead of the pilot.
The c170 is excellent for t/w training. I have it set up on 180 legs with 800 tyres, giving it a 'door sill height' of exactly the same as a c180 or 185. 3 pointers require lots of back elevator, and it's very similar in that respect to the Cub.
We teach every type of landing here, but always use wheelers for crosswinds over 6-8 kts. For very rough or soft strips and where it's into wind, the 3 pointer is good, but requires more judgement from low timers. A slightly 'tail low' wheeler seems the best for students as they still need a little flare,(which they are used to), and it's less disconcerting than the 'no nonsense' wheeler in which you seem to be far too nose low - in the c170 in particular. After a few hours they can handle this approach.
There's quite a lot of stuff re tailwheel training on the International c170 Association, and c180 Association websites. I've modelled my course on a mix of info from agricultural flying courses, what MAF used to teach their Papua New Guinea pilots, and points from other older t/w instructors I've met around Australia and PNG.
cheers,