I have to admit, I never read the ad (Automatic swap? That's a thing?). I just shared based on pictures, because I figured it'll tickle @XR7-4.6 to have been out-gauged.
At the height of the who has the fastest SC arms race it definitely happened to a few cars. If you’re going for consistent quarter mile ETs you cannot beat an automatic, plus the IRS copes substantially better from a launch on drag radials with a high stall converter automatic in front of it than it does a manual with a 5000rpm clutch dump.
There actually was a time the predominating club culture kind of considered 4R70w to manual swaps sacrilege, certain people took the notion like it was a personal betrayal to Jerry W.