It has come to my attention that I mentioned dialing a bellhousing without ever explaining what that is exactly, necessitating this post.
To dial in a bellhousing is to center the nose-cone hole to the center of the crankshaft rotation. To do this one can either remove the flywheel and clutch of leave it on, though for adaptation purposes it is much easier and definitive with the clutch removed and the flywheel in place. This allows for the maximum surface area to attach a dial indicator base to. Which brings me to the necessary equipment for this little procedure, which is a dial indicator and a base – preferable of the magnetic type. Mount the bellhousing like you would normally, and affix the dial indicator to the flywheel, maintaining an off-center orientation so as to get a good reading. Put some preload on the indicator and spin the motor over. Watching the indicator will tell you where the hole sits and to what degree it is off. If it is more than .010″ you should probably look into getting some offset pins to better align the bellhousing.