I'm finding it came with a single motor (8.5 beam) either a 5.0 or 5.7.
My guess is it was a dog with a 5.0 and did ok with a 5.7
It had enough beam for a BB but don't see any that had it, and if it did it would run pretty good
As for the drive it could come with either. Friend had about the same year and size Bayliner with a 5.0 MPI and B2 drive. Never saw how it was helping but that's what it had