Help identify my Converter

OldmanRick said

I apologize if I missed it, but doesn't your seller know where it came from? If you're not installing it right away, i'd wait and see if a few bumps here may give you a idea of who built it. Most builders keep records, and if you can determine it, the'll tell you what's up with it by the numbers. Even if you can narrow it down some, you can call a few of the builders with those numbers and see if they have any info for it or if those numbers ring a bell to them as far as who could have built it.

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This was my exact intention when making the original post. To identify and then contact for verification. I bought the project 9 months ago. Seller refused any further contact after payment was made and I had taken delivery. Total D--- move. I think he was mostly bitter about taken such a huge $ hit on the car. So, probably felt no obligation to assist with anything going forward. Fortunately for me, I did contact the original engine builder before putting out the cash. He provided paperwork and lots of info. The trans shop had been sold, but I was told that the previous owner had a good reputation. Again, all the parts that came with the car were quality. Really no short cuts appear to have been taken on the whole project. Considerable body work-customization. Quality motor parts and build, verified by my current builder. New rear; axles, bearings and gears. Re-geared fresh 904.
I have no reason to believe its not as advertised. But, an important part like this, I don't want to pay big time for screwing up. I really just want to find a way to verify what it is.

I do have time. The motor was supposed to go on the Dyno last week. Didn't work out schedule wise. Now, should be hooked up tomorrow and ran Wednesday. Then I need to come up with headers and get the car wired. I probably have 2 months before I run it.