The circuit seems basically correct.
Just some note:
* the clock frequency of 1kHz is very high for a display. You'll be unable to see the number changing. Try with much lower frequency like 1 or 2 Hz
* the BI/RBO pin is a strange input/output pin. Leave it unconnected
* try the same with LT and RBI. In TTL logic (like LS family), an unconnected pin is equivalent to a logic "1" (but this is not true for CMOS logic where every pin mus be connected to a secure digital level)
* in the real circuit, put a 0.1uF bypass ceramic capacitor as near as possible to the poer pins of the device
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