If I were you, I would call Precision of New Hampton.
Precision of New Hampton | Torque Converters, Transmission
We used their converters almost exclusively when I worked at the transmission shop and they were very good. But CALL them. Tell them what you have. One of their off the shelf converters will surely work for what you're doing and it will be way less expensive than some of the other name brands. Although your build is mild and all you want is a street cruiser, you STILL don't want a POS for a converter. Precision sells good stuff and they are really reasonable.