Hi I've been all over my shop manual and I'm tring to seperate the stern drive from the bell housing but it will only come out about a 3/4" and stops dead. Manual says the SHIFT cable is attached to the bell housing and needs a special tool to remove (91-12037)all models it says. Its a alpha I or something, it was attached to a Mercruiser 470 (1979)on the stern it has "470" decal on it.Any tricks of the trade on this issue from anyone would help.Thanks