1972 Big Block motor mount towers

[jlmerie]

I am looking at a 1972 Cheyenne parts truck. It was originally a big block truck. At some point a small block was installed. I am looking at the motor mount towers. I can not see very well and want to know if it is possible that someone left the big block towers in place when they installed the small block. That is, can you mount a small block on the big block towers. The towers in place appear to be the correct "clam shell" style towers. Before I have to see about pulling the small block just to get the motor mount towers, I want to see if these are correct. I will try to get some pictures as best I can. I took some pictures with my phone, but they don't really show anything. Thanks