What are these E67 pcm？Can It be flashed into V8 OS？

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These E67 pcm are from I4 v6 engine, Is there
a way to flash them a v8 os?

Is service number critical for Os change? I mean if I want to use cts-v or GMPP OS, do I need a service number excact same as a ctsv pcm or not?
I know there is different year model E67 require specific year Os.

Here is my case, I am in china and V8 e67 or e38 is very rare, so I thought if I can make these I4 v6 e67 work with V8 OS or trailblazer ss I6 engine for hot-rod application that would be awesome and cheap.
I want to control LS3 LS7 LSX 1FZ benz m113k engine with E67.

More important than Service Number/OS cross-compatibility is: A full flash really needs to be done with GM dealer-type tools. Doing a 'write entire' to change the complete operating system with HP Tuners will leave some parts of the old OS untouched (there are two segments that don't get written, both I think related to the throttle controls). If those untouched parts are the same in both the old and new OS you'll be fine... but going from one engine family to another that's unlikely to be the case. IF the service numbers are compatible you would need to do it with the GM flash tools.

Those are older E67 ECMs.

The 3530 service number (3 photos) was used in 2006 models.

The 7096 (1 photo) was used in 2008 models, and a few 2009 models.