As long as the crank and block aren't messed up, it will be cheaper to build the engine you have. The only damage that those kind of miles will do, are to things that you're replacing anyways. But don't forget about new sleeves too. The H22A sleeves are different from most other Honda sleeves, they are FRM (Fiber Reinforced Metal). Basically, they are made from many different metals weaved together, to make them stronger. But the problem with this weaving, is that you can't bore or hone them like the iron sleeves. So if your stock sleeves are worn at all, there's nothing you can do to them.