Flint,
You are quite correct. I currently have four Henry's, all short stroked and it does make a difference. I also shoot with "Stick, Mark 1, A1" in my rifles, to enable me to grip the barrel ahead of the frame. Very Nice indeed.
There is a caveat though. I have built an awful lot of competition rifles. I have found, because of simple physics, the Third Generation of short stroke kits works best in large bore rifles. The current crop of "Super Short" kits (legal SASS minimum lever throw) don't work as well with big bore as they do with .38s. They are superb for the competitor in .38/357 or 32-20 guns. Simply not enough mechanical advantage to move large cartridges "as well."
Coffinmaker
Who used to have Five Henry's but sold his "in the white" rifle (dumb move).