We built 540's with AFR Alum. heads and ran the same Whipple package. With the port matching you did, and the better flow of the Dart heads, plus being Aluminum heads their is less restriction. Thats why you did all that was to make horsepower, you might as well take advantage of it. Just change the top pully that will get you 1.5 pounds of boost. Our motors were in a 35 Fountain, then a Black Thunder, and currently in another Black Thunder in North East Md. I know in the 100 hrs we put on them they never came apart, and the first Black Thunder owner, never took them apart. Probably close to 250 hrs thats with the smaller pully at 7lbs of boost. Im sure Dustin will answer you but if you do it now and get the motor propped right, you will be done. When you decide you want more power or someone goes by you then its back to testing props and that headache. Good luck have fun. Great boat, I have a good friend with a 572 ci. N/A in a 288 Sunny.