I am well aware of what a 230 block is and it's still an OEM block. You might as well start with a 4.5" bore aftermarket block if you have any HP goals of 1100HP . If you don't all the money you put in that 230 block will be lost when it blows up. Caps and a girdle are only band aides for a stock block that was designed and cast out of materials only intended for passenger cars. It's your money spend it as you wish, but remember that myself and others told you it won't work.