Body SN: X53T 025768
X53T
X = 2 ton (6500, if 1954)
53 = 1953
T = Tarrytown, NY
025768 = 24768th truck built in Tarrytown

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engine:0154717T5 first may be a c or d? pretty sure its a zero.

I thought this engine had an LEA prefix in the engine serial number ("I'll check on the engine number. Its not at my house. Any chance It could be LEA758135 or B777198 or CLP923? just some numbers i wrote down...")?

That code would be in 1953: prefix letters (year/type-model/plant), followed by sequence number.

In 1954, the engine serial number had a different format, one like yours (but, yours look incomplete): sequence number, followed by plant/year/type-model code.

0154717 = sequence number = 153717th of the line
T = Tonawanda, NY engine plant
5 = year?

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Head date casting code (I presume)
16B 913

16B = ?

9 = September?
1 = 1st?
3 = 53?

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How about posting the other codes: casting codes for head and block and date casting code for block?

As you have guessed already, you have an interesting truck.

Maybe you have an early 1954-model truck, that was actually produced in 1953?