RPMs would be fine but anything should work with everything fixed. That horsepower level is easy to make as cast. Do pay to have them checked and corrected, and good parts installed as needed, not porting.
You can make that power with iron heads . I have the alu ede heads , would not go back to iron . I had mine checked after all the posts stating there were problems , they checked out 100% perfect , nothing was wrong with them .