Sorry to do this but I need to know. Is a 3.23 Sure Grip in a 489 case worth $300? Not sure if it's cone or clutch type. It's an entire 8 3/4" rear from a B body. It's close enough that I could drive to pick it up. I've been thinking about a 3.23 or similar for my car to use when the 3.91 I have is too much. The thing I like about this one is that it's a 489 case. My 3.91 is a 741.