[Bushwacker]

What you are proposing will be a very poor handling boat that won't plane below about 20 mph, won't be self-bailing, and won't ride anywhere near as well as it was designed to! A CC is already more stern heavy than my Seafari, and I had to do a lot to get my rig balanced right with a ~420 lb E-Tec 150. That hull was designed for the I-6 Merc weighing less than 300 lbs. I would definitely NOT recommend a motor any heavier than what I have! It'll run almost 50 mph with a light load with that motor, so I don't see the need for more power than that. However if you want to race, they also get 175 & 200 hp out of the 60 degree V-6 block with the same weight as the 150, although I suspect they trade mid-range torque for top end HP in the 200.

Remember the VDH hull is much more efficient than the average run-of-the-mill deep V, so just because they sell a lot of 20' Makos's, Whalers, and whatever with 200+HP motors doesn't mean that's the right motor for a SeaCraft. These hulls typically have less beam than modern boats designed for heavy 4-stroke motors, which is one reason they ride so much better, but they're also quite a bit more sensitive to weight and CG location.