Buyer beware is all I have to say... that NOS shifter plate is clearly used and that guy already has questionable business practices:
Terrance Sawtell pulled some shady stuff with regards to the Olds serpentine brackets by copying them when the original designer wouldn't partner up with him or provide the CAD files to him. He's went ahead and copied them but has to sell them for almost double what the original designer is currently selling them for... not sure why, doesn't seem like a lucrative business opportunity if you can't compete.
You can buy these exact brackets on ROP for $200 from Larry (Extreme Supreme):
This kit allows you to convert your Big Block Oldsmobile motor to a GM Serpentine setup from most 4.3l/5.7l motors from 1990-1995. The kit includes brackets, mounting hardware and supporting braces to ensure your belt doesn’t slip or throw. With this serpentine adapter kit, you can convert your...