Ok so my block was at the machine shop, for sleeving, and all that good stuff, when i finally decide to call him yesterday. He tells me that a bit broke, and cracked my cyl wall. But he told me he was looking for a new block now. A friend of mine who knows him well has a b18a block to sell, are there ANY difference in the b18 and b18b or should i just let him do it? I just dont wanna change anything over having a b18b block.