https://pcmhacking.net/memcals.html
BWFU, $83 5.0L Auto 16176424 Series II, From 6/1996
Like delcowizid said, its the right memcal in the wrong computer. The '424 has a longer case. That memcal, assuming it has not been modified to be running manual software, wont run in that computer and it'll probably start and run really badly because it'll be in limp-home mode.
There is a picture of a '424 computer here so you can see how the case is longer, though this one is running a different 3rd party adapter.
viewtopic.php?f=7&t=5442#p81961
Both computers have the same socket for the memcal, but the software is incompatible and this is a mismatch.