Long story short; Engine in my -74 S3/88 was shot. Found a 2.8 Daihatsu Rocker, which already sat in an S3 - an 109. In my in infinite wisdom, I was "hm, probably same gearbox, easy swap". No.
My 88 got a 12 bolt pattern gearbox. The adapter ring has a 10 bolt pattern, and I´m an *****...