Be sure to get the vac advance and fuel line for a 1957 truck, not a 1948.
No dis on Deveoldbluetruck
Your engine Block was cast on Dec. 20 1957.
It originally went into a 1958 model year car, not a 1957 truck.
I do not believe there is a difference between a truck block and a car block, from the same year.
Pre-bent Truck fuel lines should fit on it.
What is interesting is your block was cast on Dec 20 1957,
and three days later it was assembled and stamped Dec 23,
You could say it took them three days to build the engine.