Have you found a V-Drive?
And what do you mean by trim-pump? There's no trim on these boats (or any other hydraulic accessories that would necessitate a pump.)
I would be very surprised if the Monsoon had any different mounting points than the Assault. I'd add the silent ride muffler if you have space (pretty impressed with how quiet my Malibu is because of that.)
I'm also happy to help if you need the opposite -- I've got a Monsoon in my Malibu and easy access to take photos.
Former owner of a 1987 Supra Saltare. Current owner of a Malibu 23LSV.