400 B block

Yes the 72 230 block would be the one to have. But I have a 73 no # block and I beleave with a girdle it will be fine.I got the block with a car I bought, the car has a .055 over 440 motor with a motor home block in it now.Just getting ideas if I build another engine maybe building from 400 block.I have Indy 440-1 heads and I beleave they can handle 540 ci.