400's are they any good?

I just took a look at Hughes engines to see what they have for crank kits to go into the 400 block. They have two kits, both with a 4.15" stroke and 4.375" pistons. That makes 499 cubic inches. I'm sure there are plenty of other companies selling crank kits for them too. When I build mine I'm going to aim for what ever the practical power limit of the block is. So far what I'm hearing is that is somewhere around 750 H.P. I think that power level should be able to be reached with a pump gas motor and no power adder. Probly Edel Victor heads or INDYs, a solid roller, and around 11 to 1 comp. All that in a nice low deck motor sounds soooo good to me. In an A body thats a ten second car.