I just did the Kennedy mod on my governor. It actually works better than 
before. It moved the shift point up about 800 rpms. I agree with everybody 
when they say it shifts too early. Since I put my new motor in (ford) the 
rpm range went too 7000 rpms so when it was shifting at 4200 rpms it wasn't 
using the full potential. At least now it shifts at 5000 rpms. and more into 
the power band on the engine. When I really want to move out I shift 
manually. The mod was worth the 1 hr's work it took to do it and I would 
recommend it.