Small boats and big engines often equate to major headaches from both a survey and upkeep standpoint.  These twin 454 Crusaders were shoehorned in so tight an average-sized person could barely wedge himself in sidewise between them, let alone conduct preventative maintenance or repairs.  It’s also impossible to physically access the spaces forward and outboard of the engines.  The owner commented that when he had to replace the battery charger (located on the bulkhead forward of the starboard engine) he hired a 7-year-old boy to squeeze into the space and unscrew the mounting bolts.