I have a few big blocks. Starting at about 500HP and up. Anytime I find one that I can afford, I buy it. Then I tear them down and go through them. People will tell you anything to sell it. I have trust issues. So, I always tear them down. Then I can put what I want in them. I figure it this way, If it is worth building. It is worth over building. I have always said that horsepower sells cars, but torque wins races!