I've got one of those thread chasers I'd be willing to loan out if you want to give it a try. The snout in the picture looks to be in pretty rough shape, but it might be worth a try before going to the effort of swapping housings.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!