71 Swinger that lost it's TA block somehow-$2500

I was dry-heavin sick the day after I looked at the block. I had been searching Chrysler part numbers for 6 years by the time I bought that engine and could see it was not a regular 6 digit number....
I trust the man who did the R & R, I just think the rebuilder saw a chance and took it.
That said, I'd like to simply retitle the thread based on the discovery and everything being the same, and willing to accept advice on value with plain 340 as described otherwise, with forged steel crank.
I apologize for being a bit testy after finding out the truth after 30 years.