Engine Identification Help
 

I have a friend here in Australia that has just purchased an LT5 locally, which was described as a low km engine out of a test car. The seller has had sitting in a warehouse for 20 years I do have photos but not sure how to post on here.
If anyone can provide any info on this engine, it would be greatly appreciated.
Numbers of the engine are as follows.

Stamped, lower rear left of block. 0531 ZSH 652

Cast, 10106178 U
BA

Odd casting and odd font. 11580014

Being here in Australia, maybe the car was here for testing of the PBR brake system. Car crushed and engine saved ???? Only guessing.
Any help appreciated.

Re: Engine Identification Help