Congratulations on your Bombay, BCB42.
Bluewaters comments are correct. My boat runs a low cut "near deck sweeper" genoa as can be seen in the photos. The previous owner added a different jib track farther forward and inboard from the original factory location. If you look very closely in the photos of Far Cry undersail you can follow the lazy sheet to get an idea of where the block is in realtionship to the deck. It is just about where the cabin top starts to slope down from the highest point or, just about mid-boom. Of course if you are running more of a Yankee cut sail then the factory block location back towards the stern would be the appropriate location for best trim and much better visibility than I have!!!!!