distributor guy: - I'm pleased that it is working well for you. -Trimming the block was just to fit Saganaw transmissions. - I think the international starter was identified here years ago. To help my memory would you identify it more precisely? It seems like a good option. Beck is having starter woes that it may solve. - as to the vibration, which motor mounts are you using? Are what rpm does the vibration begin? Are you using a harmonic dampener? How much weight was removed from your flywheel? It may be possible to do something with the mounts to absorb the vibration you experience.