To mount the tranny to the motor, the bellhousings are different. In thecase of our Valiant, we didn't want a three-speed tranny for obviousreasons. So we bought a 23-spline 833 tranny from a friend for $200.Since we needed a bellhousing, another friend sold us a Lakewood safetybell for $40. It may be heavier than the factory unit, but keeping theflywheel from coming up through the floor like a buzz saw seemed kind ofimportant. It pays to ask what your buddies have sitting in theirgarages while doing this type of stuff.