Length comparison 915-shortnose G50

[Wally]

Yeah, when your engine sits further back due to not shortening the bell housing, I suppose that gives you more room for the hydraulic TOB.
Since you're using one of those inferior watercooled jap engines however , your dimensions may change in more then one way, so carefull measuring with a (dummy) engine seems neccessary anyways.

The original G50 bellhousing does have a lot of room though, so you probably won't need to machine the area around the intake shaft