You'll need a different input shaft. It's got to engage the pilot bushing, and if it's an inch shorter, it won't just won't reach. /ubbthreads/images/graemlins/frown.gif And the 1/16" difference in spline diameter won't work with the stock friction disk.
If there is a shaft that will work, Novak should have it. If you can't find it on their website, call them.
If there is a shaft that will work, Novak should have it. If you can't find it on their website, call them.