1973 dart sport brake booster

French demon said
I also have discs/drums combo, but not a V8 and I don't know if a 8" booster will block your valve cover.
Surely not. Original Midland-Ross boosters are 7 1/2" and they leave enough clearance for the SB valve cover.

On that eBay link you sent, it states it is for Chevy. Or at least an upgrade from “GM” boosters. Is that still okay? Is it sort of universal?