My first thought is bad idea.....
The Blackhawk was only built for a couple years. It's basically a Bravo1 upper with a Bravo3 lower. I believe they did not last in the higher horsepower cinfigurations so they were discontinued. But, if I remember correctly........
Blackhawks where designed for high X demension settings on boats with pads & notched hulls. I think Mercury did a bulletin on applications. I haven't searched for it, but it should be available. I'll see if I can find it if you can't.
Blackhawks worked best on boats that naturally carried the nose high. From my deepest recesses of the old brain, that was because they created a lot of stern lift with the dual props. I'm not sure they would work as they were intended on the Deep V of the Cig. Blades or Throttle Up may know more about prop design and what can be done on that issue.
I also recall people having trouble getting the boats on plane because of the required high X, but once they were on plane, midrange acceleration was phenomenal.
One more possible consideration, your idle speed should be around 6 mph or more with only one engine running because of the dual props and around a 27 pitch in your application......
If those things can be figured out, that would be one heck of a cool project.........
)
The 24 squadron has the same type of horizontal line just below the rubrail that the 24 and 28 cigs do, but this line is gone on the 27 because it looks like they were trying to keep the sides of the hull the same height, and the way the rubrail curves from front to rear, it actually goes below that point, so I guess the detail was lost as they cut the mold down, or just chose not to use it. This leaves the height of the transom, as well as the tip of the bow, on the 24 a bit taller than the 27 - but midship they are about the same. Not sure about the original cig 24's, but the Squadron's have lots of cross bracing and fully glassed bulkheads. I've beat the crap out of mine for 6 years now and not one stress crack or glass separation anywhere... not bad for a 30 yr old hull !
