Well you think somebody may have put that big block in that 50's truck? I think maybe so. I was asking if the big blocks had any visual features like the harmonic balancer or the shape of the exhaust ports or if you can look and visually see if its a tall deck or short. The last truck (m37) I bought from this place had a new flat head L6 in it so I would be willing to take a gamble on it. So you think its worth 20 bucks, ok does anybody else have an idea. A core should be worth more than that even if i turned it in for a long block would'nt it? its not somthing I would put in somthing to run, i would take it completely down and rebuild. But if its an undesirable block I may as well leave it to get crushed.