I've had a few of those briggs opposed twins before, seem decent.This old L head Briggs will be running when all the KT17 have been buried in the scrap bins.
I currently have (2) KT engines, mine are 19s.
One original style and one "type II"
Which was yours? And I have a 18 magnum opposed twin as a spare.. all running good so far.
I just wish that parts weren't so damn expensive and tough to get.