I use a bearing puller made by JP racing. But there are several ways to do it. Heat the block up by the bearing with a heat gun, place it on a hot plate and heat it up, put it in a small frying pan and heat it up, put it in the grill or oven and heat it up. Just get the case hot enough and it should about fall out. May have to give it a little tap but it should come out pretty easy. The rear bearing may also come out. Just make sure you have some good gloves on and put the bearings in before the block cools off.