Hi, i'm new to this forum, i'm currently building a motor for my truck. Using the stock block and crank, gt500 rods, probe srs forged pistons. I've had the block checked and machined .020 over. I'm going to start to fit the rings tonight. I was considering having the crank balanced, i called the machine shop and they told me $300, i called two other local shops and they wanted more. Do you guys think its really required?