The project was called Run Nigger Run, and the track was titled "Pray I Don't Kill You Faggot", released on a compilation in 1985. It's listed in his discography page on Wikipedia underneath Shellac in the "other" section.
Wonderful! Thank you very much!
Here's my impression of a Gerogerigegege track, Yellow Trash Bazooka - Wreck of Rock 'n' Roll Former Self era:
HUWAITO POWO FUKKU NIGGERU WON TOO TREE FO! AHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHGFDKJ.GHDFGHHH AHHH AHHH AHHH AHHH AHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH AHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHAHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH AH H HH H H AH AH -fucked up chainsaw noises- AHH AHHHHHHHHH AHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH