So of course the 45+ HP is more a Christmas wish rather then an "easy to archive" thing...
However a solid 40+ should be possible as the TZ250 short stroker from middle of the 90's were capable to do that, so let's see. And when getting in this higher power range you need to have the larger reed case, otherwise you get short with the reed area (may be except with the VForce setup).
The 3XV swing arm will not fit (or at least not easy) as the rear engine mount goes through the swing arm pivot. I'm looking for alternatives, may be a 1KT swing arm with some significant mods would do the job. The other solution would be a 3MA swing arm turned upside down, but these are far to expensive.