I just discovered (or re-discovered) a new B-series that won't swap.

The old school twin carburated Accord B18A. It is very old, very rare, and very JDM. It was rated at 130hp. (Note: I have yet to fully confirm the existance of this engine as other Accords of the time used a carb'd A18A, so it may be a typo)

Now that I think about it, there is also the Gold-top Accord B20A, similar but not exactly the Prelude B20A. There are a lot more "old style" B-series then most people know. Weird stuff.