Twin engine, space limited on the sides but has room in front.
Single engine has space on port side, not much on starboard and no room in front
Single BB you have to hang upside down to change the raw water pump, unless the boat does not have a Gen
Do get twin V8 5.7 or custom BB or you won't like the boat (loaded weight is around 10K LB). I started with a 454 and 330 HP and it barely made it on plane with 2 people. More folks and it was almost not happening. Changed to 502 carb and then MPI with 415 HP and it did much better, but was still slow getting up.
Had a custom 509 with 530 HP built and now she moves. Exhaust is thru hull with turn downs so its quite when going slow/docking. I have Gen with heat and AC
Buying another boat so going to sell mine but haven't decided as yet