On my first attempt to remove those 2 little bolts, the bypass housing flange ears busted all to pieces...not sure why, cuz I was taking my time and had applied Marvel Mystery Oil a few days prior, maybe that's just what they do. Anyhow, a local weld shop fixed that, then a few years later, I scored several NORS bypass housings and gaskets on eBay...the seller mentioned that he sourced this haul from a long ago closed down service station that he was cleaning out, so maybe these housings were known to be a common failure back in the day.