Don't know if your A model differs, but I have the 3200 on my 170B. I put it on to replace the crappy Maule TW that came with the plane. I'm completely happy with it. There are some finer points about dressing the sharp ends of the leaf springs while you are at it. This is from the Int'l 170 Assn site:
8. Replace your tailwheel main leaf spring every 500 hours. Remove the sharp lower/trailing edge of the leaf spring just above it in order to avoid it creating a stress-riser on the mainspring.
14. Install an L19 tailwheel tie-down eyebolt (PN 0642105) in lieu of the AN7-22A bolt that holds your tailwheel assy to the main leafspring.
Good luck finding that eyebolt at a reasonable price, though
-DP