A Weird Weiand (sb)

Now that would be improbable as the cores are one piece (interior runners and exterior sand mold) but it would be possible purpose built out of 2 halves of both cores. Like a Stealth and an Action plus mash up.
It depends on how the patterns are constructed, and there's no way a dual-plane can have a one-piece core, there would have to be a minimum of (5) primary core "sections". (6) if it has an exhaust crossover. The patterns could easily be sectioned, that would allow for this.