What makes a Small block a Small block and a Big Block a big block?

[MidNiteBlu 5.0]

To answer your question flyin, I would guess that the engine in your bus is not a big bore short stroke engine. It seems to me that the engine in thier would be a truck engine that would make more low end torque to push that big heavy bus.

Truck engines and high performance car engines are usually much different.

Later,
Nick