I am surprised that you publicly give every bit of information about that bitcoin address you owned a long time ago.
He mentioned that he has changed all the characters, so the only information he is giving here is the format and notation of the HEX keys.
...but I changed all the characters...
The private key in HEX is only 64characters long.
The private key in HEX with the network bytes and checksum included is only 74characters long. (uncompressed WIF)
The private key in HEX with the network bytes, compressed flag (0x01) and checksum included is only 76characters long. (compressed WIF)
Any other length will produce an invalid WIF private key.
Ah, my apologies I believed that the HEX key with with checksum and the compressed flag prefix was 80 characters, thanks for the clarification.